Answer:
Depth and density of the liquid determine the amount of pressure in a liquid.
Explanation:
a spring with spring constant 50 n/m is suspended from the ceiling with a 2.0 kg wood block hanging from the bottom. when a 10 g bullet is fired vertically upward into the block, stopping inside, the block begins to oscillate with its highest point 45 cm above its initial level. what was the speed of the bullet?
After being fired vertically upward into the block at a speed of 403.4 m/s, a 10 g bullet stops inside the block and the block starts to oscillate, with its highest point rising 45 cm above the beginning level.
Calculation:
Mu+0=(m+M)V
V=mu/m+M= velocity of system after collision
1/2(m+M)V² = 1/2kx²
(m+M)*m²u²/(m+M)² = kx²
u²=(2+10^-2)*40*0.45^2
u=√16.28 *10²
u=403.4 m/s
Speed is the rate of movement along a path, whereas velocity is the speed and direction of an object's motion. In other words, speed is a scalar value, but velocity is a vector. Velocity has magnitude and direction because it is a vector quantity. The distance (d) traveled over the change in time is the definition of speed (t).
Speed is a unit of measurement for how swiftly a body moves. The rate at which an object's location changes in any direction is referred to as speed. The distance traveled divided by the trip time is how speed is calculated.
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How do you find the cutoff wavelength and frequency of a photoelectric effect?
The formula to calculate cutoff frequency and wavelength is hfc = Φ, λc = c/fc respectively.
What is cutoff wavelength?The cutoff wavelength is the lowest wavelength at which light may dislodge electrons from a metal plate.
The cut-off wavelength, also known as the threshold wavelength, is the smallest wavelength of light that will not cause electrons to be emitted from a metal surface. The wavelength of the light must be less than the threshold wavelength if no electrons are expelled.
What does "cutoff frequency" mean?Where the signal is cut off is determined by the cutoff frequency. Lowpass filters are all that simpler synthesizers have. If the cutoff frequency is set at 2500 Hz and the signal comprises frequencies between 20 and 4000 Hz, frequencies over that frequency are filtered.
The formula to calculate cutoff frequency is hfc = Φ
where h = plank's constant
f = frequency
c = speed of the light
The formula to calculate cutoff wavelength is λ = c/f
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Please help soon. ( took a picture) thank you anyone that helps
Answer:
A
Explanation:
what is the weight of a 3.67kg ball?
Answer:
mass 3.67 kg, density 600 kg/m3) is fitted
with lead (density 1.14 * 10^4 kg/m3) so that it floats in water with
0.900 of its volume submerged. Find the lead mass if the lead is fitted
to the block’s (a) top and (b) bottom.
question: a 7.0 g bullet is fired into a 1.5 kg ballistic pendulum. the bullet emerges from the block with a speed of 200 m/s, and the block rises to a maximum height of 9.4 cm. find the initial speed of the bullet.
The u1 =initial speed of the bullet= 490.86 m/sec is the correct answer.
What is linear momentum?Linear momentum is a vector quantity that describes an object's motion through space. It is calculated by multiplying the mass of an object by its velocity. Momentum is conserved in closed systems, meaning that it is not changed by any action within the system. This makes it a very useful tool for analyzing the motion of objects and predicting their behavior. Momentum can be transferred between objects, and is often used to describe collisions. It is also used to describe the effects of forces on objects, such as how a force can cause an object to accelerate or decelerate. Momentum is an important concept in physics, and can be used to describe a variety of physical phenomena.
Using conservation of linear momentum, we write
m1u1 + m2 u2 = m1 v1 + m2v2
where u1 ,u2 are the initial velocities of masses m1 and m2
where v1 ,v2 are the final velocities of masses m1 and m2
hence (.007) (u1) + 1.5(0) = 1.5(v2) + .007(200).........................1
using energy equation for the block alone we get
mgh = 1/2 m (v2)^2
hence 9.8(.094) =.5 (v2)^2
hence v2=1.357 m/sec
substitute it in 1
we get,
u1 =initial speed of the bullet= 490.86 m/sec
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consider two children sitting on a merry-go-round, with one closer to the outer edge and one closer to the center.
A toy rocket has a velocity of 40 m/s and a kinetic energy of 2000 j. calculate its mass.
Answer:
2.5 kg
Explanation:
Kinetic Energy = 1/2 m * v^2
2 * KE / v^2 = m 2 * 2000 / ( 40^2) = 2.5 kg
Is water a Scope 3 emission?
Emissions from the biological decomposition of the waste during waste water treatment. Due to the fact that the organization does not run or regulate these emissions, they are categorized as Scope 3: Category 5 Waste Generated in Operations.
Is water an emission of carbon?Nearly 290 million metric tonnes of CO2 are produced annually in the US by the energy required to transfer, purify, and consume water for both residential and commercial purposes, which is equal to 5% of the country's overall carbon emissions.
What does a scope 3 carbon and mission look like?Although they occur from sources that the corporation does not own or control, scope emissions are a byproduct of company activity. Scope 3 activities include, for instance, the extraction and manufacturing of bought materials.
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An object with an initial speed of 4. 0 meters per second accelerates uniformly at 2. 0 meters per second 2 in the direction of its motion for a distance of 5. 0 meters. What is the final speed of the object?.
For a distance of 5.0 meters, an object moving at an initial speed of 4.0 meters per second accelerates uniformly at 2.0 meters per second2. What is the object's final speed? Vi=4m/s
The object's final speed after uniformly accelerating in the direction of its motion is 6 m/s.
We apply the third equation of motion to calculate the object's final speed. Where u is the starting velocity, an is the acceleration, and s is the distance traveled, v is the end speed or velocity, a.
20 m/s is the final velocity.
Initial speed is equal to 16 m/s.
Equation 1 can be solved for by substituting these numbers above.
20² = 16²+2×a×36\s36a = 400-256
36a = 144\sa = 144/36\sa = 4
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How are solar and wind different?
Solar electricity is less effective than wind power. In comparison to solar panels, wind turbines produce more energy overall, use less energy, and emit less CO2 into the atmosphere.
What distinguishes wind and solar energy?Solar energy is less effective than wind energy. The atmosphere receives less CO2 from wind turbines. Solar panels emit 70 grams of CO2 per hour, compared to 4.64 grams per hour from wind turbines.
What distinguishes solar panels from wind turbines?20% of the energy captured from the sun may be converted by the most effective residential solar panel on the market. In contrast, wind turbines may convert 60% to 90% of the energy they capture from the wind.
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if the type i error (α) for a given test is to be decreased, then for a fixed sample size n
Type I error, for a particular test is reduced. There will be an increase in Type II error. Regarding Type I and Type II errors of a significance test, the following statements are accurate:
Test power is equal to 1 - P(Type II error)The probability of a Type I error increases with sample size for a fixed significance level. If the true population parameter value differs more from the assumed parameter value indicated in the null hypothesis, the likelihood of a Type II error would diminish.For a fixed sample size n, a Type II mistake is more likely to occur when a Type I error is less likely to occur.Test power is equal to 1 minus P. (Type II error). This is accurate; a test's power is described asP = 1 - β, where β is the likelihood of making a Type II error and P is the test's power.P(Type II mistake) = P - 1 (Type I error). This is untrue; the likelihood of making a Type II error is and is related to the test's power by P = 1 -. The significance level (the parameter) defines the likelihood of making a Type I error.
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help me solve this exercise pls
Explanation:
1. 19.6m/s
2. 274.4 m/s²
3. 28
A car is driving down a road in the early morning when a deer walks into the road. if the deer was 25 meters away when the driver noticed it and the car was traveling at 20 m/s, did the car strike the deer? assume instant reaction time and that the car has a braking acceleration of -8.33 m/s2.
For the auto now no longer to strike the deer, the minimal deceleration ought to be eight m / (s ^ 2) with a blended immediately drivers response took at the distance of 15 metres.
The given parameters are;
The distance farfar from the deer the auto turned into while the motive force notices the deer = 25 m
The velocity of the auto = 20m / s
Therefore, for the auto now no longer to strike the deer, the minimal deceleration of the auto ought to be from 20 ^ 2 / (2 * 25) = eight m/s² for a direct motive force response time
For a motive force response time of 0.five seconds, we have
Distance moved with the aid of using car = 0.five * 20 = 10 metersDistance moved with the aid of using car = 0.five * 20 = 10 meters
Minimum deceleration of the auto required = 20 ^ 2 / (2 * 15) =13. overline three m/s^ 2
Distance of the auto from the deer on the begin of deceleration = 25 - 10 = 15 meters.
Therefore, climate the deer is struck with the aid of using the auto relies upon at the drivers response time and deceleration of the auto.
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When a horizontal force of magnitude 14.7 Newton is applied to a body of mass 4 kg which is resting on a rough horizontal plane, the body is found to be in limiting equilibrium.
Calculate the resultant reaction P (Newton) acting on the body.
The resultant reaction P (Newton) acting on the body is determined as 14.7 N.
What is limiting equilibrium?
Limiting equilibrium means that an object is just on the threshold of motion. In other words, a slight application of force will result in the motion of the body.
The resultant reaction P (Newton) acting on the body is calculated by applying Newton's second law of motion as follows;
∑F = ma
where;
m is the mass of the bodya is the acceleration of the bodyF - Ff = ma
where;
F is the applied forceFf is the resultant reaction acting on the bodyIf the body is in equilibrium, the acceleration of the body is zero.
F - Ff = m(0)
F - Ff = 0
F = Ff
F = Ff = 14.7 N
Thus, the resultant reaction acting on the body is a function of the applied force and the direction of the force as shown in the above calculation.
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What is the formula for calculating phase shift?
Answer:
Phase shift {F(x)} = Asin(Bx-C) + D.
What is the correct definition of a rarefaction?
A: region of zero pressure in a medium caused by a passing wave
B: region of low pressure in a medium caused by a passing wave
C: region of low altitude in a medium caused by a passing wave
D: region of high pressure in a medium caused by a passing wave
Answer: B
Explanation:
1. Predict the change in capacitance of a parallel plate capacitor as the area of the plates is increased. 2. Predict the change in capacitance of a parallel plate capacitor as the separation between the plates is increased. 3. Briefly describe the observations you will make in Activity 1-2 of the lab to test one of these two predictions. 4. If you have two identical capacitors, what do you predict will be the capacitance of the two connected in parallel? 5. Briefly describe the observations you will make in Activity 2-1 of the lab to test this prediction. 6. What devices will you use to measure the decay of voltage in an RC circuit?
The capacitor is the energy storage device in the form of electrical energy and the capacitance is the ratio of charge and potential difference between capacitors.
The capacitance in the parallel plate capacitor is directly proportional to the area of the conductor and inversely proportional to the distance between the capacitors. The unit of capacitance is Farad(F).
1) Capacitance of the parallel plate capacitor is directly proportional to the area of the conductors and hence Area increases, the capacitance also increases.
2) Capacitance is inversely proportional to the distance between the capacitors and hence distance between the capacitors increases, Capacitance decreases.
3) C = ε₀A/d, where A is the area of the capacitor and d is the distance between the capacitor, and C is the capacitance of the capacitor. The capacitance of the parallel plate capacitor is directly proportional to the area of the parallel plate capacitor and d is the distance of separation of plates.
4) If two identical capacitors are connected in parallel, the potential across the capacitors are same and the charge in the capacitors is different.
5) If the system has two capacitors connected in parallel, the charges remain unchanged and hence the net charge is equal to the individual charges of the capacitors. The net charge of the system is, Q = Q₁+Q₂. Q₁=C₁V and Q₂=C₂V, Q = V(C₁+C₂).
6) The device used to measure the decay of voltage in an RC circuit is the voltmeter. Voltmeter is a device used to measure the potential difference between two points.
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a large truck and a small car have a head-on collision. which has the greater acceleration: the truck or the car? the truck has the greater acceleration because it has the greater mass. the car has the greater acceleration because it has the smaller mass. both the truck and car have the same magnitude of acceleration.
When a large truck and a small car have a head-on collision, B: "the car has the greater acceleration because it has the smaller mass".
Acceleration refers to the rate of change of velocity, reflecting that acceleration means the speed is changing. Based on the scenario when a large truck and a small car have a head-on collision, the car will exert a higger acceleration in comparison to the acceleration of the truck because the car has smaller mass.
It is because the acceleration is far greater for the lighter or smaller vehicles which would be subjected to a far greater velocity/speed change at the same time (duration of collision).
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Stranger anxiety is less likely to appear in conjunction with Multiple Choice absence of the mother.
О familiar settings.
O feelings of i
O nsecurity
O unfamiliar settings.
Option B. feelings of i A child's worry caused by a stranger is known as "stranger anxiety."
Answer. Strangers or strange environments are frequently what cause stranger anxiety. Therefore, given that the setting is familiar and there is no perceived threat from outsiders, it is less likely to emerge in a multiple-choice context.
When a stranger approaches, sobbing is a sign of stranger anxiety. It is typical when it begins at around 8 to 9 months of age and typically goes away by age 2. The infant's developmental process of separating the familiar from the unknown is linked to stranger dread. A infant has separation anxiety when they are separated from the person who loves them the most, usually their mother. When: Stranger anxiety
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given ωn = 20 rad/s and δst = 0.05 m, the frequency response function of the vibration system is
The system's steady-state response is 0.05 m for F(t) = 200 cos(10t) N. The steady-state response of the system is 0.10 m for F(t) = 200 cos(20t) N.
Part A's excitation frequency is 10 rad/s, while the system response frequency is 20 rad/s. According to the frequency response function, the steady-state response has a magnitude of 0.25 m.
Therefore, the steady-state response is 0.25 m cos (10t + 0.8 radians), where 0.8 radians is the phase angle of the system response.
Both the system response frequency and the excitation frequency for part b are 20 rad/s. According to the frequency response function, the steady-state response has a magnitude of 0.5 m.
The question is incomplete I answered it in general way.
Given ωn= 20 rad/s and δst = 0.05 m, the frequency response function of the vibration system is given. If the excitation function is a. F(t) = 200 cos(10t) N, b. F(t) = 200 cos(20t) N, Using the figures above to obtain the steady-state responses of the system.
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If a cheetah runs 180 miles in 3 hours, what is its average speed?
Answer:
Avg speed = 60 miles per hour
Explanation:
We generally know that,
→ Speed = Distance ÷ Time
Formula we use,
→ s = d/t
Now the average speed will be,
→ s = d/t
→ s = 180/3
→ [ s = 60 ]
Hence, average speed is 60.
Watch the following terms with the correct numbers in the figure below 7.- -5 6. (inside cavity) Modified from Designua / Shutterstock.com 1 A. Zygote 2 B. Blastocoel V 3 C. Inner cell mass V 4 D. 4-cell stage 5 E. Morula V 6 F. 2ry oocyte (egg) 7 G. Blastocyst 00 H. Blastomeres
1. Zygote 2. 2ry oocyte (egg) 3. Morula 4. 4-cell stage 5. Blastocyst 6. Blastomeres 7. Inner cell mass - terms with the correct numbers.
What is cell division?The process by which a parent cell divides into two daughter cells is known as cell division. Cell growth and chromosome replication precede cell division, which often happens as part of a longer cell cycle.
Meiosis is a type of cell division that produces haploid gametes for sexual reproduction by reducing the number of chromosomes from two of each type in the diploid parent cell to one of each type in the daughter cells. Mitosis is a type of cell division that produces daughter cells that are genetically identical to the parent cell.
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A 0. 28 kg stone you throw rises 34. 3 m in the air. The impulse your hand receives from the stone while it throws the stone is.
A 0.28 kg stone you throw rises 34.3 m in the air. The impulse our hand receives from the stone while it throws the stone is 7.3 N.s
What is Impulse?
Impulse can be defined as the sudden force acting on an object for a short interval of time. Conventionally represented by “J”. Sometimes by “imp” and expressed in “N.s”.
Impulse = change in momentum
the stone rises to a height of 34.3m
final velocity of the stone is 0m/s
so applying equation of motion:
V2 - U2 = 2gS ( where S is the height, g is value of gravity )
0 - U2 = 2(-9.8)×34.3
U2 = 672.3
U = √672.3
= 26m/s
so initial velocity is 26m/s.
Impulse = change in momentum
Impulse = mv - mu
= 0 - (0.28× 26)
= - 7.3 N.s
So the impulse our hand receives from the stone while it thrown the stone is 7.3 N.s
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Puck b has 2ma the mass of puck a. Starting from rest, both pucks are pulled the same distance across frictionless ice by strings with the same tension. How much is the final speeds of pucks a and b.
The final speed of pluck a is [tex]\sqrt{2}[/tex] times the speed of pluck b.
So we know, F= ma ( m is the mass of the particle and a is the acceleration )
Mass of pluck b =2m
Mass of pluck a = m
The tension in the string is the same and also the surface is frictionless. Hence, the only force acting on both the pluck is the force of tension 'T' .
acceleration of pluck b = T/2m
acceleration of pluck a =T/m
Let the distance traveled by both of them be 's'.
The initial velocity of both the plucks is 0.
We know v²-u² = 2as
u=0 for both plucks.
vₐ²-0 = (2)(T/m)(s)
=> Vₐ= [tex]\sqrt{\frac{2Ts}{m} }[/tex]
Similarly, Vb =[tex]\sqrt{\frac{Ts}{m} }[/tex]
Hence we can easily see, the velocity of pluck a is [tex]\sqrt{2}[/tex] times the speed of pluck b.
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a student rides a bicycle in a circle at a constant speed and constant radius. a force diagram for the student-bicycle system is shown in the figure above. the value for each force is shown in the figure. what is the acceleration of the student-bicycle system?
Answer:
The acceleration of the student-bicycle system is 3.52 m/s^2 toward the center of the circle.
Explanation:
What is the force of sliding?
The force of sliding is the force required to keep an object moving at a constant velocity while it is sliding on a surface.
When an object is sliding on a surface, it experiences a force of friction that acts opposite to its direction of motion. This force of friction is what keeps the object moving at a constant velocity, rather than accelerating or decelerating.
The magnitude of the force of friction depends on the properties of the two surfaces in contact, such as their roughness and the type of material they are made of, as well as the normal force, which is the force exerted perpendicular to the surface. If the object is moving at a constant velocity, the force of friction is equal in magnitude to the force applied to the object, but opposite in direction.
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What does the 2+ in mg2+ represent?
2+ in [tex]Mg^{2+}[/tex] represents that for becoming stable magnesium needs to release 2 electrons.
As, the atomic number of Magnesium = 12
So, the electron distribution will be like 2, 8, 2
As here, we can see, 2 electrons are present in the outermost orbit of Magnesium, due to which magnesium is not stable.
In order to become stable, Magnesium needs to release its 2 electrons.
After releasing 2 of its electrons, there will be 8 electrons in the outermost orbit of magnesium, and due to the octet in the outermost orbit, magnesium becomes stable.
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1.24 × 107 kilograms. Write the mass in standard notation.3
The product of 1.24 and 107 kilograms expressed in standard form is 1.3268 x 10² kg.
What is standard form?A standard form is a form of writing equations, numbers, or expressions using a certain set of rules.
Standard form is a method often used by scientists to express large number into a more condensed form, usually in power of ten.
The product of 1.24 and 107 kilograms expressed in standard form is calculated as;
1.24 x 107 kg = 132.68 kg
in standard form = 1.3268 x 10² kg
Thus, numbers expressed in standard forms makes it very easy to represent and recall the number.
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following the inelastic collision of the carts, the two carts fuse into an object with double the mass of the original cart. there is then a frictional section of the track to slow the cart to a stop over 20 meters. describe the amount of work due to friction and frictional force exerted to stop both carts over 20 meters. calculate the work due to friction and frictional force. in your calculations, be sure to explicitly state the equations you use and what values you will be substituting to calculate the final value.
In the inelastic collision of the carts, the two carts fuse into an object with double the mass of the original cart. The works due to friction and the frictional force exerted to stop the two carts over 20 meters is 980 Joules.
What is inelastic collision?Generally, To calculate the work due to friction and the frictional force exerted to stop the two carts over 20 meters, we will need to know the coefficient of friction between the carts and the track, the mass of the two carts, and the acceleration due to gravity.
The equation for work due to friction is:
Work = Friction force * Distance
The equation for the friction force is:
Friction force = Coefficient of friction * Normal force
The normal force is equal to the mass of the two carts multiplied by the acceleration due to gravity:
Normal force = Mass * Gravity
We can substitute these equations into the equation for work to get:
Work = (Coefficient of friction * Mass * Gravity) * Distance
To calculate the work, we need to substitute in the values for the coefficient of friction, mass, gravity, and distance. Let's say the coefficient of friction is 0.5, the mass of the two carts is 10 kilograms, and the acceleration due to gravity is 9.8 meters per second squared. The distance the carts travel is 20 meters.
Substituting these values into the equation for work, we get:
Work = (0.5 * 10 * 9.8) * 20
Solving this equation gives us a final value for the work of: 980 Joules.
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Patients with agraphia ______.are suffering from Wernicke's aphasiawould have Broca’s aphasiacannot read a map or graphhave the inability to write
Expressive aphasia is also known as broca aphasia. Broca's aphasia patients have difficulty speaking, although they are able to understand language.
They can organise their thoughts and decide what to say. they are unable to construct sentences. You speak incomprehensibly to other people when you have Wernicke's aphasia. Reading comprehension was consistently weaker in three patients with Wernicke's aphasia than it was in the other two. The paraphasia of speech, repetition, and naming highlight the aphasic aspect of the condition even if this syndrome mimics alexia with agraphia. Furthermore, prior... Wernicke's aphasia can be treated, however some patients completely recover on their own. Even after serious loss, linguistic capacity often returns in children under the age of eight. Speech therapy is typically necessary. Recovery often occurs in three
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