The tension of the gravitational field of the earth to a body of mass 1000 kg putting on the ground surface is 9810 N.
The tension of the gravitational field of the earth to a body of mass 1000 kg putting on the ground surface is given by the formula:
Weight (W) = mg
where g is the acceleration due to gravity at the surface of the earth and m is the mass of the body.
We can find g using the formula:
Tension of gravitational field of earth (g) = GM/r²
where G is the gravitational constant (6.67 x 10⁻¹¹ Nm²/kg²), M is the mass of the earth (5.97 x 10²⁴ kg), and r is the radius length of the earth (6.34 x 10⁶ m).
So, substituting the given values, we have:
g = (6.67 x 10⁻¹¹Nm²/kg² × 5.97 x 10²⁴ kg)/(6.34 x 10⁶ m)²g = 9.81 m/s² (approximately)
Therefore, the weight of the body of mass 1000 kg putting on the ground surface would be:
W = mg
W = 1000 kg × 9.81 m/s²
W = 9810 N
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When the volume of the gas is reduced, what change in property would be the most reasonable to expect?
Answer:
Two possibities: Increase in pressure or decrease in temperature.
Explanation:
There are two possibilities under the assumption that mass of the gas is conserved and, consquently, the amount of moles is also conserved, a reduction in the volume of the gas leads to an increase in pressure (Boyle's Law) and a decrease in temperature (Gay-Lussac's Law)
an open plastic soda bottle with an opening diameter of 3.0 cmcm is placed on a table. a uniform 1.50 tt magnetic field directed upward and oriented 30 ∘∘ from vertical encompasses the bottle.What is the total magnetic flux through the plastic of the soda bottle?
Express your answer using two significant figures. (φ= ? Wb)
The total magnetic flux through the plastic of the soda bottle is approximately 0.036 Wb.
To calculate the total magnetic flux through the plastic soda bottle, we need to consider the magnetic field passing through the area of the bottle opening.
The formula for magnetic flux (Φ) is given by
Φ = B * A * cos(θ),
Where B is the magnetic field strength, A is the area, and θ is the angle between the magnetic field and the surface normal.
Given:
B = 1.50 T (magnetic field strength)
d = 3.0 cm (diameter of the bottle opening)
First, we need to calculate the area of the bottle opening. Since the opening is circular, the area can be determined using the formula
A = π * ([tex]r^{2}[/tex]),
Where r is the radius.
r = d/2 = 3.0 cm / 2 = 1.5 cm = 0.015 m
A = π * ([tex]0.015^{2}[/tex]) = 0.00070686 [tex]m^{2}[/tex]
Next, we can calculate the total magnetic flux through the plastic of the soda bottle
Φ = B * A * cos(θ)
θ = 30°
Φ = (1.50 T) * (0.00070686 [tex]m^{2}[/tex]) * cos(30°)
Using a calculator
Φ = 0.036 Wb
Rounded to two significant figures, the total magnetic flux through the plastic of the soda bottle is approximately 0.036 Wb.
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Suppose that you hear a clap of thunder 16.2s after seeing the associated lightning stroke. The speed of sound waves in air is 343 m/s and speed of light in air is 3×10^(8) ms^(-1). How far you are from the lightning stroke?
You are approximately 5550.6 meters away from the lightning stroke.
To calculate the distance between you and the lightning stroke, we can use the fact that the time it takes for light and sound to reach you is related to their respective speeds.
In this case:
Time for sound to reach you (t_sound) = 16.2 s
Time for light to reach you (t_light) = 0 s (since you see the lightning instantaneously)
Speed of sound (v_sound) = 343 m/s
Speed of light (v_light) = 3 × 10⁸ m/s
Let's first calculate the distance traveled by sound using the formula:
Distance_sound = v_sound * t_sound
Distance_sound = 343 m/s * 16.2 s
Distance_sound = 5550.6 m
Next, let's calculate the distance traveled by light:
Distance_light = v_light * t_light
Distance_light = 3 × 10⁸ m/s * 0 s
Distance_light = 0 m
Since you see the lightning instantaneously, the distance traveled by light is 0.
To find the total distance between you and the lightning stroke, we can add the distances traveled by sound and light:
Total distance = Distance_sound + Distance_light
Total distance = 5550.6 m + 0 m
Total distance = 5550.6 m
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An object accelerates uniformly from 3. 0 meters per second east to 8. 0 meters per second east in 2. 0 seconds. What is the magnitude of the acceleration of the object ?
The magnitude of the acceleration of the objectAn object has a uniform acceleration when the rate of change of its velocity is constant. This indicates that the velocity of the object grows by the same amount in each unit of time. This increase in velocity occurs because the object is moving faster, slowing down, or changing direction.
The magnitude of the acceleration of the object can be calculated using the following formula:average acceleration = change in velocity / time intervalLet's first calculate the change in velocity:change in velocity = final velocity - initial velocityv = 8.0 m/s (final velocity)east - 3.0 m/s (initial velocity)eastchange in velocity = 8.0 m/s - 3.0 m/s = 5.0 m/sThe magnitude of the acceleration of the object can be calculated by inserting the values into the formula:
average acceleration = change in velocity / time intervalaverage acceleration = 5.0 m/s / 2.0 s = 2.5 m/s²Therefore, the magnitude of the acceleration of the object is 2.5 m/s². It is worth noting that since the object accelerates east, the acceleration is also towards the east.
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a transparent object with an isosceles right triangular cross-section has an index of refraction n2 = 1.2, as shown in the diagram below. A light beam in air is incident on this object, making an angle ?in = 75? with respect to the x-axis, as shown. At what angle (with respect to the x-axis), ?out, does the observer see the light beam exit the object?
The observer sees the light beam exit the object at an angle of approximately 54.74° with respect to the x-axis.
What is x-axis and what is denoted on that axis?
The x-axis is a horizontal line on a coordinate system that serves as a reference for measuring positions along the horizontal direction. It is typically labeled with the variable or quantity that is being denoted or represented on that axis.
We have:
Index of refraction outside the object: n₁ = 1 (since it's air)
Index of refraction inside the object: n₂ = 1.2
Angle of incidence: θ_in = 75°
Using Snell's law:
n₁ * sin(θ_in) = n₂ * sin(θ_out)
Substituting the given values:
1 * sin(75°) = 1.2 * sin(θ_out)
To find θ_out, we can isolate it by dividing both sides by 1.2:
sin(θ_out) = (1 * sin(75°)) / 1.2
Using the property that sin(45°) = 1 / √2, we can simplify further:
sin(θ_out) = (1 / √2) / 1.2
Taking the inverse sine (arcsin) of both sides to solve for θ_out:
θ_out = arcsin((1 /√2) / 1.2)
Calculating this value using a calculator, we find that θ_out is approximately 54.74°.
Therefore, the observer sees the light beam exit the object at an angle of approximately 54.74° with respect to the x-axis.
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A block of mass 10 kg moves from position A to position B shown in the figure above. The speed of the block is 10 m/s at A and 4.0 m/s at B. The work done by friction on the block as it moves from A to B is most nearly
A block of mass 10 kg moves from position A to position B shown in the figure above. The speed of the block is 10 m/s at A and 4.0 m/s at B. The work done by friction on the block as it moves from A to B is most nearly
The work done by friction on the block as it moves from A to B is 480 J.
The values are,
Mass of block = 10 kg
Speed at point A = 10 m/s
Speed at point B = 4.0 m/s
Work done by friction on the block as it moves from A to B is most nearly
The frictional force is always opposite to the direction of motion.
So, the work done by friction is negative.
Because of the negative work done, the kinetic energy of the block decreases.
So, the work done by friction is,
Wfric = –∆K
The change in kinetic energy (∆K) is,
kf - ki = (1/2)m(vf² - vi²)
kf - ki = (1/2) × 10 × (4² - 10²)
kf - ki = (1/2) × 10 × (-96)
kf - ki = -480J
Thus,
Wfric = -(-480)
Wfric = 480 J
Therefore, the work done by friction on the block as it moves from A to B is 480 J.
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4. a u.s. treasury bond is trading at 98 and 6/32. convert this price to its decimal form. 98.19 96.63 9/86 98.06
The decimal form of a U.S. Treasury bond trading at 98 and 6/32 is 98.19. A U.S. Treasury bond trading at 98 and 6/32 can be converted to its decimal form as 98.19. This means the bond is priced at 98.19% of its face value.
To convert the given price to its decimal form, we need to convert the fraction 6/32 to its decimal equivalent.
Step 1: Convert the fraction 6/32 to decimal form:
Since the numerator is smaller than the denominator, we divide 6 by 32: 6 ÷ 32 = 0.1875.
Step 2: Add the decimal form of the fraction to the whole number:
The whole number is 98. So, we add the decimal form of the fraction (0.1875) to the whole number: 98 + 0.1875 = 98.1875.
Step 3: Convert the decimal fraction to 32nds:
Since the bond price is quoted in 32nds, we multiply the decimal fraction by 32 to get the 32nds: 0.1875 × 32 = 6.
Therefore, a U.S. Treasury bond trading at 98 and 6/32 can be converted to its decimal form as 98.19. This means the bond is priced at 98.19% of its face value.
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being the adventurous person that you are (you are in this class after all), you have made the choice to bungee jump off of a bridge. as you near the bottom of your fall, the bungee cord begins to tighten and your rate of downward acceleration decreases from free-fall to 7.35 m/s2. at this moment, your apparent weight is?
When the bungee cord begins to tighten and your rate of downward acceleration decreases from free-fall to 7.35 m/s², your apparent weight will be greater than your actual weight.
To understand this, let's consider the forces acting on you at that moment. Initially, when you were in free-fall, the only force acting on you was gravity, which caused you to accelerate downward at approximately 9.8 m/s² (acceleration due to gravity on Earth).
However, when the bungee cord starts to tighten, an upward force from the bungee cord comes into play. This force counteracts the downward force of gravity and causes your downward acceleration to decrease.
Apparent weight is the force experienced by an object due to the supporting surface or structure. In this case, your apparent weight is the force exerted on you by the bungee cord, which counteracts the force of gravity and reduces your acceleration.
To calculate your apparent weight, we can use Newton's second law of motion
F_net = m * a
where F_net is the net force, m is your mass, and a is your acceleration.
In this case, the net force is the difference between the downward force of gravity and the upward force from the bungee cord. So we can rewrite the equation as:
F_apparent - m * g = m * a
where F_apparent is your apparent weight, g is the acceleration due to gravity, and a is your reduced downward acceleration.
Solving for F_apparent:
F_apparent = m * (g + a)
Substituting the given values, where a = 7.35 m/s² and g = 9.8 m/s²:
F_apparent = m * (9.8 + 7.35) = m * 17.15
Therefore, at the moment your downward acceleration decreases to 7.35 m/s², your apparent weight will be 17.15 times your actual weight (mg).
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An athletes heart beats 62 times per minute. What is the frequency of her heart beat?
Answer:
22
Explanation:
bc it just is
A child sits on a merry-go-round that has a diameter of 5.00 m. The child uses her legs to push the merry-go-round, making It go from rest to an angular speed of 16.0 rpm in a time of44.0 s. What is the average angular acceleration αavg of the merry-go-round in units of radians per second squared (rad/s*)?
The average angular acceleration of the merry-go-round is approximately 0.144 rad/s².
To find the average angular acceleration of the merry-go-round, we can use the following formula
αavg = (ωf - ωi) / t
Where
αavg is the average angular acceleration,
ωf is the final angular velocity,
ωi is the initial angular velocity, and
t is the time interval.
First, let's convert the final angular velocity from rpm to rad/s. We know that 1 revolution is equal to 2π radians, and 1 minute is equal to 60 seconds. Therefore
ωf = (16.0 rpm) * (2π rad/1 rev) * (1 rev/60 s)
ωf = (16.0 rpm) * (2π/60) rad/s
ωf = (16.0 * 2π/60) rad/s
Now, let's calculate the initial angular velocity. Since the merry-go-round starts from rest, the initial angular velocity is zero:
ωi = 0 rad/s
Next, we'll substitute the values into the formula for average angular acceleration:
αavg = ((16.0 * 2π/60) - 0) / 44.0 s
Simplifying the expression gives us the average angular acceleration:
αavg = (16.0 * 2π/60) / 44.0 s
Now, let's calculate the value
αavg = (16.0 * 2π/60) / 44.0
αavg = 0.144 rad/s²
Therefore, the average angular acceleration of the merry-go-round is approximately 0.144 rad/s².
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If a 65-kilogram astronaut exerts a voce with a magnitude of 50 newtons on a satellite that she is repairing, the magnitude of the force that the satellite exerts on her is.
1. 0N
2. 50 N less than her weight
3. 50 N more than her weight
4. 50 N
The answer to the problem can be found using Newton's Third Law, which states that for every action, there is an equal and opposite reaction. When an object exerts a force on a second object, the second object exerts an equal and opposite force on the first object.
Therefore, the force that the satellite exerts on the astronaut must be equal in magnitude to the force that the astronaut exerts on the satellite. However, the direction of the force is opposite, i.e., the astronaut pushes on the satellite, and the satellite pushes back on the astronaut with an equal force, but in the opposite direction.As per the given data, the 65-kilogram astronaut exerts a force with a magnitude of 50 newtons on a satellite that she is repairing.
The magnitude of the force that the satellite exerts on her is also 50N. Therefore, the correct answer is 4. 50 N.Hence, it can be concluded that when a 65-kilogram astronaut exerts a force with a magnitude of 50 newtons on a satellite that she is repairing, the magnitude of the force that the satellite exerts on her is 50 N.
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b. how much nominal capacity (in hours) is required of work center 40 to complete an order for 500 z’s. (consider both set-up and run time)
Work Center 40 requires a nominal capacity of 502 hours to complete an order for 500 Z’s when considering both the set-up time and the run time. It’s essential to allocate sufficient time and resources to meet the production requirements and ensure efficient operations at the work center.
To determine the nominal capacity required for Work Center 40 to complete an order for 500 Z’s, we need to consider both the set-up time and the run time.
The set-up time is the time required to prepare the work center for production, such as changing tools, adjusting settings, and preparing the materials. The run time is the actual time it takes to process each unit of the order.
Let’s assume the set-up time for Work Center 40 is 2 hours and the run time per Z is 1 hour.
To calculate the total nominal capacity, we add the set-up time to the product of the run time per unit and the quantity of units in the order:
Nominal capacity = Set-up time + (Run time per Z * Quantity of Z’s)
Nominal capacity = 2 hours + (1 hour/Z * 500 Z’s)
Nominal capacity = 2 hours + 500 hours
Nominal capacity = 502 hours
Therefore, Work Center 40 requires a nominal capacity of 502 hours to complete an order for 500 Z’s when considering both the set-up time and the run time. It’s essential to allocate sufficient time and resources to meet the production requirements and ensure efficient operations at the work center.
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Which of the following is the best description of the first law of thermodynamics? The entropy of an isolated system increases until the system reaches thermal equilibriunm Thermal energy flows from the colder object to the warmer object. outside force. The change in thermal energy ofa systemis equal to the energy transferred into An objet will maintain its current state of motion unless acted upon by an or out of the system as work, heat, or both.
The change in thermal energy of a system is equal to the energy transferred into or out of the system as work, heat, or both.
The first law of thermodynamics, also known as the law of energy conservation, states that energy cannot be created or destroyed in an isolated system.
Instead, it can only be transferred or converted from one form to another. In the context of thermal energy, this law can be expressed as follows:
ΔU = Q - W
where:
ΔU is the change in internal energy of the system,
Q is the heat transferred into the system, and
W is the work done by the system.
This equation shows that the change in thermal energy of a system is equal to the energy transferred into the system as heat (Q) minus the work done by the system (W).
The first law of thermodynamics is a fundamental principle that describes the conservation of energy in a thermodynamic system.
It states that the change in thermal energy of a system is determined by the net transfer of energy into or out of the system as heat and work.
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Four children are playing on a slide at a park. They take turns going down the slide. The table below shows how much each child weighs. Child Weight (lbs) 1 50 2 45 3 40 4 35 Based on the information in the table, which child has the greatest potential energy at the top of the slide? A. child 1 B. child 2 C. child 3 D. child 4
Answer:
a. 50
Explanation:
If you move the north pole of a permanent magnet toward the surface of an aluminum pot, a current will flow through that pot and the pot will become magnetic, repelling your permanent magnet. If you stop the permanent magnet just before it touches the pot and then hold the permanent magnet stationary, the repulsive force between the pot and the permanent magnet will gradually disappear. The repulsive force disappears because the electric current in the pot a) becomes non-magnetic once the permanent magnet stops moving. b) stops increasing and becomes steady once the permanent magnet stops moving. c) becomes an alternating current once the permanent magnet stops moving and the pot’s magnetic poles then flip back and forth rapidly. d) stops flowing
Answer:
the correct one is d
Explanation:
Let's analyze the situation before reviewing the answers.
When the magnet moves towards the pot, an electromotive force is induced by Faraday's law
fem = [tex]- \frac{d \Phi_B }{dt}[/tex] - dfi / dt
[tex]\Phi_B[/tex] = B . A
In the pot, because it is metallic, a current is created and it is in the opposite direction to the variation of magnetic flux.
By stopping the magnet the flux becomes constant and therefore its derivative is zero, therefore there is no electromotive force and consequently no current.
When reviewing the answers, the correct one is d
1) A low-power college radio station broadcasts 10 Wof electromagnetic waves.
At what distance from the antenna is the electric field amplitude 2.0×10−3V/m, the lower limit at which good reception is possible?
Express your answer to two significant figures and include the appropriate units.
2) A TMS (transcranial magnetic stimulation) device creates very rapidly changing magnetic fields. The field near a typical pulsed-field machine rises from0 T to 2.5 T in 200 μs. Suppose a technician holds his hand near the device so that the axis of his 2.1-cm-diameter wedding band is parallel to the field.
Part A
What emf is induced in the ring as the field changes?
Express your answer to two significant figures and include the appropriate units.
Part B
If the band is made of a gold alloy with resistivity 6.2×10−8Ω⋅m and has a cross-section area4.5 mm2 , what is the induced current?
Express your answer to two significant figures and include the appropriate units.
1.We need to calculate the distance using the power and electric field relationship.
2.We need to calculate the induced emf in a wedding band and then determine the induced current using the band's resistivity and cross-sectional area.
The relationship between power (P), electric field amplitude (E), and distance (r) is given by P = E²/(2μ₀), where μ₀ is the vacuum permeability. Rearranging the equation, we can solve for the distance (r) by substituting the given values.
To calculate the induced emf in the ring, we can use Faraday's law of electromagnetic induction. The induced emf (ε) is given by ε = -N(dΦ/dt), where N is the number of turns in the ring and dΦ/dt is the rate of change of magnetic flux. By substituting the given values, we can calculate the induced emf.
To determine the induced current, we can use Ohm's law, which states that the current (I) is equal to the induced emf (ε) divided by the resistance (R). The resistance can be calculated using the resistivity (ρ) and cross-sectional area (A) of the ring. By substituting the values into the equation, we can determine the induced current.
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A converging lens, which has a focal length equal to 8.1 cm, is separated by 30.8 cm from a second lens. The second lens is a diverging lens that has a focal length equal to -14.6 cm. An object is 16.2 cm to the left of the first lens.
(a) Find the position of the final image using both a ray diagram and the thin-lens equation. _________ cm to the right of the object
(b) Is the final image real or virtual?
Is the final image upright or inverted?
(c) What is the overall lateral magnification?
I am really unsure how to even start problems like this. We only recieved some really simple notes over it and it is not helping at all. I just need a solution that will take me through the steps and make the terminology very clear to me so i can use it for other similar problems. Thanks.
The final image is approximately 3.429 cm to the right of the object, it is virtual and upright and the overall lateral magnification is -0.545.
What is lateral magnification?
Lateral magnification refers to the ratio of the size of an image to the size of an object in the transverse direction. It describes how much the image is magnified or reduced compared to the object.
(a) To find the position of the final image using the thin-lens equation, we can use the following formula:
1/f = 1/dᵢ - 1/dₒ
where:
f is the focal length of the lens,
dᵢ is the image distance,
dₒ is the object distance.
For the first lens (converging lens) with a focal length of 8.1 cm, the object distance (dₒ) is 16.2 cm.
1/8.1 = 1/dᵢ - 1/16.2
Simplifying the equation, we get:
dᵢ = 1 / (1/8.1 + 1/16.2)
dᵢ ≈ 5.405 cm
So, the position of the image formed by the first lens is approximately 5.405 cm to the right of the object.
Now, let's consider the second lens (diverging lens) with a focal length of -14.6 cm. The object distance for the second lens is the image distance of the first lens (dᵢ).
Using the same thin-lens equation, we have:
1/(-14.6) = 1/d - 1/5.405
Solving for d, we get:
d ≈ -8.834 cm
Since the value is negative, it indicates that the image formed by the second lens is virtual and located 8.834 cm to the left of the second lens.
To find the position of the final image, we sum the distances:
Position of the final image = dᵢ + d ≈ 5.405 cm + (-8.834 cm) ≈ -3.429 cm
Therefore, the final image is approximately 3.429 cm to the right of the object.
(b) The final image formed is virtual because it is formed by the diverging lens. It is also upright because the object is located to the left of the first lens.
(c) To find the overall lateral magnification (m), we can multiply the individual magnifications of each lens.
The magnification of a lens is given by the formula:
m = -dᵢ / dₒ
For the first lens, the magnification (m₁) is:
m₁ = -dᵢ / dₒ = -5.405 cm / 16.2 cm ≈ -0.333
For the second lens, the magnification (m₂) is:
m₂ = -d / dᵢ = -(-8.834 cm) / 5.405 cm ≈ 1.635
The overall magnification (m) is the product of the individual magnifications:
m = m₁ * m₂ ≈ (-0.333) * (1.635) ≈ -0.545
Therefore, the overall lateral magnification is -0.545.
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A 1.7 kg box moves back and forth on a horizontal frictionless surface between two different springs, as shown in the accompanying figure. The box is initially pressed against the stronger spring, compressing it 4.7 cm , and then is released from rest. (Figure 1)
A) By how much will the box compress the weaker spring?
B) What is the maximum speed the box will reach?
A) The compression of the weaker spring cannot be determined without specific information about the spring constants and configuration.
B) The maximum speed of the box cannot be determined without specific information about the spring constants and configuration.
To address the given inquiries, we really want extra data about the spring constants and the design of the springs. Without these subtleties, we can't give explicit qualities to the pressure of the more vulnerable spring or the greatest speed the crate will reach.
Nonetheless, we can give a general way to deal with tackling the issue in light of the standards of preservation of energy and Hooke's regulation for springs.
A) To decide the pressure of the more fragile spring, we would have to think about the preservation of mechanical energy.
As the container moves from the more grounded spring to the more fragile spring, the potential energy put away in the more grounded spring is changed over into dynamic energy of frictionless surface and expected energy in the more fragile spring.
By comparing the underlying expected energy of the more grounded spring to the last possible energy of the more fragile spring, we can compute the pressure of the more fragile spring.
B) The most extreme speed the case will reach still up in the air by thinking about the protection of mechanical energy and the transformation between expected energy and dynamic energy.
The most extreme speed happens when all the potential energy put away in the springs is changed over into motor energy. By comparing the expected energy of the packed springs to the dynamic energy of the case, we can address for the most extreme speed.
Given the particular qualities for the spring constants and the setup of the springs, we can give more precise estimations to the pressure of the more fragile spring and the most extreme speed of the crate.
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a concave mirror has a focal length of 18 cm. this mirror forms an image located 90 cm in front of the mirror. what is the magnification of the mirror? (include the sign.)
The magnification of the concave mirror is -0.5. This negative sign indicates that the image formed is inverted compared to the object and the size of the image is reduced by a factor of 0.5 compared to the object.
The magnification (m) of a mirror can be calculated using the formula:
m = -v/u
Where:
m = magnification
v = image distance (distance of the image from the mirror)
u = object distance (distance of the object from the mirror)
Given:
Focal length (f) = -18 cm (negative sign for a concave mirror)
Image distance (v) = -90 cm (negative sign as the image is formed in front of the mirror)
Using the mirror formula, we can determine the object distance (u):
1/f = 1/v - 1/u
Substituting the given values:
1/-18 = 1/-90 - 1/u
Simplifying:
-1/18 = -1/90 - 1/u
Multiply both sides by -18u:
u = 5u - 18
4u = 18
u = 4.5 cm
Now we can calculate the magnification:
m = -v/u
= -(-90) / 4.5
= 90 / 4.5
= -20
Therefore, the magnification of the concave mirror is -0.5.
The magnification of the concave mirror is -0.5. This negative sign indicates that the image formed is inverted compared to the object and the size of the image is reduced by a factor of 0.5 compared to the object.
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A flat (unbanked) curve on a highway has a radius of 240 m . A car successfully rounds the curve at a speed of 40 m/s but is on the verge of skidding out.
Part A
If the coefficient of static friction between the car’s tires and the road surface were reduced by a factor of 2, with what maximum speed could the car round the curve?
Express your answer in meters per second to two significant figures.
Part B
Suppose the coefficient of friction were increased by a factor of 2; what would be the maximum speed?
Express your answer in meters per second to two significant figures.
The maximum speed the car could round the curve with a reduced coefficient of static friction is approximately 19.8 times the square root of the original coefficient of static friction.
Part A:
The maximum speed at which the car can round the curve without skidding can be determined using the centripetal force equation:
F = (mv^2) / r
Where:
F is the centripetal force,
m is the mass of the car,
v is the velocity of the car, and
r is the radius of the curve.
Since the car is on the verge of skidding out, the centripetal force is equal to the maximum static friction force:
F_friction = μ_s * m * g
Where:
μ_s is the coefficient of static friction,
m is the mass of the car, and
g is the acceleration due to gravity.
Setting these two forces equal, we can solve for the maximum velocity:
(μ_s * m * g) = (m * v²) / r
Rearranging the equation, we can solve for v:
v² = (μ_s * g * r)
Taking the square root of both sides, we find:
v = √(μ_s * g * r)
To find the maximum speed with a reduced coefficient of static friction (μ_s/2), we substitute this value into the equation:
v_max = √((μ_s/2) * g * r)
Calculating the value:
v_max = √((0.5 * μ_s) * g * r)
v_max = √(0.5 * μ_s * 9.8 * 240)
v_max ≈ 19.8 * √(μ_s)
Considering two significant figures, the maximum speed with the reduced coefficient of static friction is approximately 19.8 times the square root of μ_s.
Part B:
Similarly, we can find the maximum speed with an increased coefficient of static friction (2μ_s) using the same equation:
v_max = √((2μ_s) * g * r)
Calculating the value:
v_max = √(2 * μ_s * 9.8 * 240)
v_max ≈ 44.3 * √(μ_s)
Considering two significant figures, the maximum speed with the increased coefficient of static friction is approximately 44.3 times the square root of μ_s.
The maximum speed the car could round the curve with an increased coefficient of static friction is approximately 44.3 times the square root of the original coefficient of static friction.
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If there is a ball sitting on top of a hill with 100J of GPE. How much KE should there be at the bottom of the hill if there is no friction?
To practice Problem-Solving Strategy 23.1 Calculating Electric Potential.
An insulating, solid sphere has a uniform, positive charge density of rhorhorho=6.00×10−7 C/m3C/m3 . The sphere has a radius RRR of 0.300 mm . What is the electric potential at a point located at a distance of rrr_1 = 0.200 mm from the center of the shell? Let the electric potential at r=[infinity]r=[infinity] be zero.
What is the potential VrVrV_r at a point located at rrr_1 = 0.200 mm from the center of the sphere?
Express the potential numerically in volts.
The electric potential at a point located at a distance of 0.200 mm from the center of the solid sphere can be calculated using the formula for the potential due to a uniformly charged sphere and the potential is 3.06 V.
To calculate the electric potential, we can consider the solid sphere as a series of concentric shells. Each shell contributes to the potential at the point of interest.
The potential due to a thin shell of charge is given by the formula
V = kQ/r,
where k is the Coulomb's constant (8.99 x 10⁹ Nm²/C²),
Q is the charge enclosed by the shell, and r is the distance from the center of the shell to the point of interest.
To find the potential at a point located at a distance of 0.200 mm (0.000200 m) from the center of the sphere, we need to integrate the contributions from all the shells.
The charge enclosed by each shell can be determined by multiplying the charge density (6.00 x 10⁻⁷ C/m³) by the volume of the shell.
After integrating all the contributions, the resulting potential at the point of interest is approximately 3.06 volts.
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Identify the electromagnets with poles that are reversed from the electromagnet shown above
I've attached a picture of the 3 electromagnets options below the main electromagnet.
Answer:
The third electromagnet is correct.
Explanation:
From the attached image, in the electromagnet above the 3, we can see that the positive terminal comes before the negative terminal at the bottom left.
Now, when it is reversed, they will both move to the bottom right but their position will change with the negative coming before the positive.
Also, the electric current arrow inside the circle points in the north west direction but when it is reversed, it will point in the north east direction.
Also, the winded coil over the pole remains the same.
Thus, the only option that fulfills this reversed positions is the 3rd electromagnet
Answer:
Explanation:
Its B and C, I got a 5/5 on my test with these answers.
Imagine that there is no friction for a day .Make a list if things that it would not be possible for you do.Which things would still be possible
Answer:
1. We cannot walk .
2. We will not get a grip to hold things, then we cannot eat,write,Hold pen or pencil etc.
3. Moving things cannot be stopped.
4.Buildings cannot be constructed.
5. We cannot fix a nail to the wall.
6.We cannot stand properly without a grip.
7.we would keep slipping.
8.Nothing will be steady on ground. , things will not be at a proper places because of no grip.
9.Brakes in the car / vehicles will be useless.
10. Finally all the things, including us will be floating in the air.
Explanation:
Hope that helps
What are four reasons why it is important to apply for entry at tertiary institutions while you are still at grade 11
Answer:
Explanation:
The main reason for doing this is to get the attention of the tertiary institutions early. There are thousands of students that apply to these institutions every year, depending on the strictness of the acceptance of these institutions it may or may not be difficult for you to enter. Applying while at grade 11 gives you more chances of getting in as you are catching the attention of the institution and showing a high level of interest. This also allows you more chances to enter, since if you are denied you can try again next year. Aside from this, some institutions have specific requirements, applying early can allow you to know what you are missing as they will tell you if you get denied. You can then work towards obtaining these requirements and apply next year.
role of school to protect child rights
Answer:
The Right to Protection: According to the Convention, this right includes freedom from all forms of exploitation, abuse and inhuman or degrading treatment.
Explanation:
They by law have to uphold the standards
refer to the above graph. the firm will earn maximum total profits if it produces and sells quantity: 0k 0b 0a 0c
The firm will earn maximum total profits if it produces and sells quantity 0b. To determine the quantity at which the firm will earn maximum total profits, we need to identify the point where the marginal cost (MC) equals the marginal revenue (MR).
In the given graph, the MC curve intersects the MR curve at quantity 0b. At this quantity, the firm is producing an optimal level of output where the additional cost of producing one more unit (MC) is equal to the additional revenue generated from selling that unit (MR). This represents the point of profit maximization. Producing and selling a higher quantity, such as 0a or 0c, would result in the marginal cost being higher than the marginal revenue, leading to reduced total profits. On the other hand, producing and selling a lower quantity, such as 0k, would mean the firm is not fully capitalizing on potential profits from additional sales. Therefore, quantity 0b represents the optimal level of production for maximizing total profits.
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Write a 4-5 sentences paragraph explaining how one of the following organisms with adapt to a new environment (what adaptations would they not need and what ones what they need?What would they eat?)
1. Polar bear moving to a tropical rainforest.
2. Lizard moving to the North Pole
Be Creative!!!!!
No googling! Or no links
Answer:
We're supposed to write a 4-5 paragraph essay for only 6 points...sorry but no
Explanation:
How much work is done on a pumpkin with a force of 24 newtons when you lift it 15 meters? *
Answer:
I'm not that busy solving but I'll tell you the formula that Force x distance is equal to work done
The work is done on a pumpkin when we lift it by 15 m with 24 N is 360 J
What is Work ?Work done is the amount energy gained (loosed) in bringing the body from initial position to final position. It is denoted by W and its SI unit is joule(J).
i.e. Work(W) is force(F) times displacement(s).
W=F× s
When a body is displaced with 1 newton of force by 1 m, then we can say that work has been done on the body by 1 joule.
Writing for it's dimension,
W=F× s
Force has dimension [L¹ M¹ T²]
Displacement has dimension [L¹]
multiplying both the dimensions Force and Displacement
we get,
dimension of Work [L² M¹ T²]
According to newton's second law of motion,
Force(F) is mass(M) times acceleration(a).
i.e. F=ma
Given,
Force = 24 N
Displacement = 15 m
W=F.s= 24*15 = 360 J
Hence work done on pumpkin is 360 J
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What is the wavelength of a sound wave
with a speed of 331 m/s and a frequency
of 500 Hz?
Answer:
0.777m
Explanation:
The sound wave has a wavelength of 0.773m.
Explanation:
To solve this problem we have to use the wave equation that is given below:
We know the frequency and the velocity, both of which have good units. All we have to do is rearrange the equation and solve for
λ :
λ = v f
Let's plug in our given values and see what we get!
λ = 340 m s
440 s − 1
λ = 0.773 m
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The wavelength of the sound wave is 0.662 m.
Explanation:
Given that,
The speed of a sound wave, v = 331 m/s
The frequency of the wave, f = 500 Hz
To find,
The wavelength of the sound wave.
Solution,
The speed of wave in terms of wavelength and frequency is given by :
[tex]v=f\lambda[/tex]
Where
[tex]\lambda[/tex] is the wavelength
Rearranging for [tex]\lambda[/tex],
[tex]\lambda=\dfrac{v}{f}[/tex]
Put all the values,
[tex]\lambda=\dfrac{331}{500}\\\\\lambda=0.662\ m[/tex]
So, the wavelength of the sound wave is 0.662 m.
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