Answer:
false
Explanation:
like poles repel and opposite poles attract. :)
Opposite poles attractc each other.
Same poles repels each other.
A projectile is launched at 30° above ground level. what other angle at the same speed will result in the same range?
Answer:
[tex]60^{\circ}[/tex] (assuming that air resistance is negligible.)
Explanation:
Let [tex]g[/tex] denote the gravitational field strength. If air resistance on the projectile is negligible:
Vertical acceleration of the projectile will be constantly [tex](-g)[/tex]. In other words, [tex]a_{y} = (-g)[/tex].Horizontal velocity of the projectile will be constant.Let [tex]\theta[/tex] denote the angle at which the projectile is launched. Let [tex]v[/tex] denote the initial velocity of the projectile:
Initial vertical velocity of the projectile will be [tex]u_{y} = v\, \sin(\theta)[/tex].Initial horizontal velocity of the projectile will be [tex]u_{x} = v\, \cos(\theta)[/tex].Also because air resistance is negligible, vertical velocity of the projectile will be [tex]v_{y} = (-u_{y}) = (-v\, \sin(\theta))[/tex] right before the projectile lands. In other words, while the projectile was in the air, the change in vertical velocity would be [tex](-v\, \sin(\theta)) - (v\, \sin(\theta)) = (-2\, v\, \sin(\theta))[/tex].
Divide the change in velocity by acceleration to find the duration of the flight:
[tex]\begin{aligned}t &= \frac{v_{y} - u_{y}}{a_{y}} \\ &= \frac{(-v\, \sin(\theta)) - (v\, \sin(\theta))}{(-g)} \\ &= \frac{(-2\, v\, \sin(\theta))}{(-g)} \\ &= \frac{2\, v\, \sin(\theta)}{g}\end{aligned}[/tex].
Range measures the horizontal distance that this projectile has travelled. At a constant horizontal velocity of [tex]u_{x} = v\, \cos(\theta)[/tex], this projectile would travel a distance of:
[tex]\begin{aligned}(\text{range}) &= u_{x}\, t \\ &= (v\, \cos(\theta))\left(\frac{2\, v\, \sin(\theta)}{g}\right) \\ &= \frac{2\, v^{2}\, \sin(\theta)\, \cos(\theta)}{g}\end{aligned}[/tex].
Apply the double angle identity [tex]2\, \sin(\theta) \, \cos(\theta) = \sin(2\, \theta)[/tex] to further simplify this expression:
[tex]\begin{aligned}(\text{range}) &= \cdots \\ &= \frac{2\, v^{2}\, \sin(\theta)\, \cos(\theta)}{g} \\ &= \frac{v^{2}\, (2\, \sin(\theta)\, \cos(\theta))}{g} \\ &= \frac{v^{2}\, \sin(2\, \theta)}{g}\end{aligned}[/tex].
Note that in this question, [tex]v^{2}[/tex] and [tex]g[/tex] are both constant. Hence, for another angle of elevation [tex]\hat{\theta}[/tex], the range of the projectile will be the same as long as [tex]\sin(2\, \hat{\theta}) = \sin(2\, \theta)[/tex].
[tex]\sin(2\, \hat{\theta}) = \sin(2\, (30^{\circ}))[/tex].
Since [tex]0^{\circ} \le \hat{\theta} \le 90^{\circ}[/tex], [tex]0^{\circ} \le 2\, \hat{\theta} \le 180^{\circ}[/tex]:
[tex]\sin(2\, \hat{\theta}) = \sin(180^{\circ} - 2\, \hat{\theta}) = \sin(2\, (90^{\circ} - \hat{\theta}))[/tex].
Therefore, [tex]\hat{\theta} = 90^{\circ} - \theta = 90^{\circ} - 30^{\circ} = 60^{\circ}[/tex] will ensure that [tex]\sin(2\, \hat{\theta}) = \sin(2\, \theta)[/tex]. Launching the projectile at [tex]60^{\circ}[/tex] will reach the same range.
[tex]\begin{aligned}(\text{new range}) &= \frac{v^{2}\, \sin(2\, (60^{\circ}))}{g} \\ &= \frac{v^{2}\, \sin(2\, (30^{\circ}))}{g} = (\text{original range})\end{aligned}[/tex].
some give me atleast 5
Robot Mass stays the same. Anywhere in the universe, an object has the same mass as it has on Earth. Gravity affects an object's weight. The identical object weighs less on the moon than it does on Earth because there is less gravity there.
What mass of robot on moon and earth?The mass and size of the moon also impact its gravitational pull. The moon won't draw things toward itself with the same force as the Earth because it has a lot less mass than the latter.
Therefore, This implies that even if robot mass remains the same, you would weigh less if you traveled to the moon.
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here is a thumb dipped in paint
which of the following of the ripe fruits is around the same size as the coloured part of the thumb
a. strawberry and mango
b lemon and orange
c grape and cherry
d lychee and apple
The ripe fruits is around the same size as the colored part of the thumb are grape and cherry. Hence, option (C) is correct.
What is fruit?Fruit is a blooming plant's fleshy or dry, fully developed ovary that contains a seed or seeds. As a result, apricots, bananas, and grapes are all considered to be fruits as well as bean pods, maize grains, tomatoes, cucumbers, and (in their shells) acorns and almonds. However, the term is typically only used to describe matured ovaries that are delicious and either pulpy or succulent.
A developed ovary and its related elements constitute a fruit in terms of botany. It often contains seeds that have grown from the encased ovule after fertilization, though parthenocarpy, or growth without fertilization, is also known.
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The maximum speed around a level curve is 30. 0 km/h. What is the maximum speed around a curve with twice the radius? (assume all other factors remain unchanged. ).
The maximum speed around a level curve is 30. 0 km/h. What is the maximum speed around a curve with twice the radius is 42.4 km/h.
Meaning of the maximum speed curve:
You might travel at a maximum speed of around 1.4 times as fast on a curve with a radius of 60 meters (twice as much), according to the equation, which also states that your maximum speed is proportional to the square root of the curve's radius.
According to that,
30 km/hr is the maximum speed.
New radius equals 2 r
In all scenarios, the centripetal force will be the same.
Calculating the new top speed around a curve is necessary.
Using the centripetal force formula:
[tex]\frac{mv^{2} }{r} = \frac{mv^{2}}{r}[/tex]
Fill out the formula with the value
[tex]\frac{v^{2} }{2r} = \frac{30^{2} }{2r}[/tex]
[tex]v= 30\sqrt{2} \ Km/h[/tex]
[tex]v = 42.4 Km/h[/tex]The maximum speed around a curve is therefore 42.4 km/h.
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What is operant conditioning vs classical conditioning?
Its consequences, either rewarding the desired behavior or punishing the undesired behavior. It is based on the idea that behavior is a function of its consequences. modified by the association of a stimulus with a previously neutral stimulus. It is based on the idea that behavior is a function of its antecedents.
Operant conditioning is a type of learning in which an individual's behavior is modified by its consequences. It is based on the idea that behavior is a function of its consequences, either rewarding the desired behavior or punishing the undesired behavior in order to shape behavior. Classical conditioning is a type of learning in which an individual's behavior is modified by the association of a previously neutral stimulus with a particular stimulus. It is based on the idea that behavior is a function of its antecedents. In operant conditioning, the response is voluntary, while in classical conditioning, the response is involuntary. Operant conditioning focuses on how behavior is strengthened or weakened in response to reinforcement or punishment, while classical conditioning focuses on how behavior is acquired through association.
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What does the N stand for in this formula?
The total number of subjects or observations in the sample is denoted by the letter "n."
What does math's N stand for?The collection of all natural numbers is known as N. Positive, non-zero whole numbers make up the natural numbers. N = 1 , 2 , 3 , 4 , .
What does N in a series represent?The letter "n" represents the word "number." By changing the term number's value, we can create a sequence utilizing the nth term ( n ). Following the sequence's formula, we would substitute 10 for "n" to obtain the 10th term; similarly, we would substitute 50 for "n" to discover the 50th term.
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What causes magnetic stripes on the seafloor ?
Answer:
The striped magnetic pattern develops because, as oceanic crust pulls apart, magma rises to the surface at mid-ocean ridges and spills out to create new bands of ocean floor. Later, after the planet’s magnetic field flips again, the next stripe of new ocean floor aligns its polarity.
Explanation:
hope this helps!
how can i run my car heater at maximum setting to cool down the engine if the car is overheated and the engine is stalled and just cranks without starting?
An engine can be cool down by the below steps
Leave the radiator cap on until it is coolPop the hood when there is no more steam coming out.Knowing how to cool an overheated engine is a significant expertise for any authorized driver. Having the option to analyze and fix your own issues can get you back out and about rapidly, forestall exorbitant mechanical issues, and assist you with realizing when to look for proficient assistance.
Steps which I can take to cool down an overheated engine of car:
The strain and steam inside can shoot a hazardous fly of liquid back at your face. Avoid any and all risks and leave the radiator cap on the vehicle however long you can. Assuming it feels warm to the touch, leave it.In the event that the vehicle isn't excessively hot, switch off the vehicle and pop your hood. Assuming the hood is incredibly hot to the touch or on the other hand on the off chance that you see steam, it is prudent to hold on until the hood cools before you open it as far as possible. Opening the hood disperses a portion of the intensity away from the motor.To know more about engine,visit here:
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How do you find nSolve?
You may get approximate numerical values for each of a polynomial equation's roots with NSolve. NSolve can be used to solve groups of concurrent equations. Mathematica's numerical mathematics (Mathematica Tutorial)
Describe NSolve.Equation, "Variable = initial value," NSolve identifies numerically all possible answers to the given equation for the provided unknown variable and its initial value.
What makes solve and NSolve different from one another?To solve an equation or group of equations algebraically, use the function solve. Although it is sometimes preferable to have a numerical solution, it is not always possible to solve an equation algebraically. In either scenario, a group of equations or an individual equation can be solved numerically using NSolve.
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a box of mass m is being accelerated up a vertical wal by a constant force f applied at an angle
Consider a force of magnitude F pulling an object over a surface. The object is moving horizontally, with an angle of between the force and motion direction.
The length of the line AB makes up the force's component in the direction of motion.
What effects does angle have on force?
The component of force perpendicular to the incline reduces as the angle increases, while the component of force parallel to the incline grows. The weight vector's parallel component is what drives the acceleration. As a result, accelerations increase with increasing incline angles.
If we measure the acceleration and the driving force, we can use the formula F = ma to compute the mass of an item moving uniformly in a circle.
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How is ultrasound used to detect the depth of the sea?
A SONAR transmits ultrasonic waves into the ocean, and after two seconds, it detects the reflected waves from a sunken ship.
How do we measure the depth of the ocean?
The scanning sonar concurrently produces ultrasonic waves 360 degrees around the ship and is able to rapidly recognise and display any echoes that do return.
Sound is frequently and quickly used to determine ocean depth. Ships can scan the terrain of the ocean below using a technology known as sonar, which stands for sound navigation and range. The device sends sound waves to the ocean floor and measures how long it takes for an echo to return. An ocean depth gauge is called a fathometer.
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Why is it important to have a reference direction specified before describing a location in terms of positive or negative?n
It is important to have a reference direction specified before describing a location in terms of positive or negative because that reference point is the 0 Value of the distance we are going to describe in Negative or positive direction as that direction is given according to the point 0.
What is direction?Direction is the path given from a reference point telling that how much something travelled or developed in a specific position.
Reference point:
It is the fixed point from where soemithin is defined is respect with that reference point. As example the distance of Suraj from Reeta is 2 km here Reeta is reference point.To know more about Direction visit
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the w10×15 cantilevered beam is made of a-36 steel and is subjected to the loading shown.(figure 1)
A-36 steel is used to construct the w10x15 cantilevered beam, which is put under the indicated loading.
Moment of inertia for w10×15 is equal to 68.9in4 and Young's modulus for A–36 steel is equal to 29e3 ksi. Thus Slope at B can be given as,
θB = P₂x³/ (2EI) + P₁l³/ (2EI)
θB = (5 × 6³ + 9 × 12³)/ (2 × 29 × 10³ × 68.9)
θB = 0.0042rad
Therefore , displacement at B can be written as,
yB = P₂x³(3l - x)/ (6EI) + P₁l³(3l - l)/ (6EI)
yB = ( 5 × 6³ × (3 × 12 - 6) + 9 × 12³ × 2 × 12)/ (6 × 29 × 10³ × 68.9)
yB = 0.034ft
The given question is incomplete,
The W10×15 cantilevered beam is made of A-36 steel and is subjected to the loading shown. Suppose that w = 2.7 kip/ft .E = 29 (103) ksi and I = 68.9 in4. (Figure 1) Determine the slope of the beam B, measured counterclockwise from the positive x axis. Determine the displacement of the beam at B.
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If a net horizontal force of 8. 2 n is applied to a baby carriage whose mass is 11. 5 kg what acceleration is produced?.
Answer:
Below
Explanation:
F = m * a
8.2 N = 11.5 kg * a
a = .71 m/s^2
When oberving an object, you determine it' moving at a contant velocity and in a traight line. Which of thee BEST decribe the ituation?
The correct answer is B) the net force acting on the object must be zero.
If an object is moving at a constant velocity and in a straight line, it means that the net force acting on the object is zero. This is because the velocity of an object is a measure of its speed and direction of motion, and if an object is moving at a constant velocity, it means that its speed and direction are not changing. In order for an object to change its velocity, there must be a net force acting on it. If the net force is zero, the object will continue to move at a constant velocity in a straight line.
A) there are no forces acting on the object is incorrect, because there are always forces acting on an object, such as gravity, friction, and air resistance.
C) the net force acting on the object is pushing in the same direction the object is traveling is incorrect, because if the net force is pushing in the same direction as the object is moving, it would cause the object to accelerate in that direction, rather than maintaining a constant velocity.
D) the net force acting on the object is pushing in the opposite direction the object is traveling is incorrect, because if the net force is pushing in the opposite direction as the object is moving, it would cause the object to decelerate or change direction, rather than maintaining a constant velocity.
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The question is -
When observing an object, you determine it is moving at a constant velocity and in a straight line. Which of these BEST describes the situation?
A) there are no forces acting on the object
B) the net force acting on the object must be zero
C) the net force acting on the object is pushing in the same direction
the object is traveling
D) the net force acting on the object is pushing in the opposite direction the object is traveling
Immediately after they push away from each other, how does the motion of the mother and daughter change?.
Both travel rearward, but the daughter accelerates more quickly motion.
Every action has an equal and opposite response, according to Newton's third law of motion. Consequently, when the two skaters collide. They'll both advance backward together.
However, the mother weighs 100 kg, compared to the daughter's 50 kg. due to the daughter's lower mass. Daughter as a result accelerates more quickly in the reverse direction.
As a result, both travel backward, but the daughter does so more quickly than the mothe motionr.
The following is an expression that represents Newton's second law:
a = F/m and F = ma or
According to this law, a body's acceleration is determined by two variables. The first is the body's mass and the net force that is operating on it. The acceleration is directly proportional to the net force acting on the body and inversely proportional to the mass.
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A sports car accelerates at a constant rate from rest to a speed of 27. 8 m/s in 8. 00 s. What is the displacement of the sports car in this time interval?.
The displacement of the sports car is approximately 222.4 m. This is the distance traveled by the car in the 8.00 s time interval, assuming that it accelerates at a constant rate.
To calculate the displacement of the sports car, you will need to know its acceleration as well as its initial and final velocities. Displacement is defined as the change in position of an object, and it can be calculated using the equation:
Displacement = (Final Velocity + Initial Velocity) / 2 * Time
In this case, the initial velocity of the sports car is 0 m/s (since it is starting from rest) and the final velocity is 27.8 m/s. The time interval is 8.00 s. Plugging these values into the equation above, we get:
Displacement = (27.8 m/s + 0 m/s) / 2 * 8.00 s
This simplifies to:
Displacement = 27.8 m/s / 2 * 8.00 s
This further simplifies to:
Displacement = 27.8 m/s * 8.00 s / 2
This simplifies to:
Displacement = 222.4 m
So the displacement of the sports car is approximately 222.4 m. This is the distance traveled by the car in the 8.00 s time interval, assuming that it accelerates at a constant rate.
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What are authorized sources for derivative classification?
An existing, correctly designated source document that has been extracted, rephrased, restated, and/or generated in a new form for inclusion in another document counts as a second permitted source for derivative classification.
Who is eligible to serve as an initial classification authority?the OCA rollover Classification Authority at Origin a person appointed in writing to classify material in the first instance by the President, the Vice-President, agency heads, or other president-designated officials.
What information is contained in the block containing the categorization authority?The classification authority block, or CAB, indicates who has power over and how long the classification determination will last. It identifies the person who classified the document, what it was generated from, what it was downgraded to (if applicable), and the date it was declassified.
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What are 3 examples of irony in The Interlopers?
The 3 examples of irony in The Interlopers are:
Death by Nature: It's ironic that two men went hunting and were hunted by a pack of wolves.
Call for Help: It's ironic that the couple's decision to use his call ends up attracting a pack of wolves instead of fellow travelers.
Forgiveness: Too Little, Too Late: It's ironic that two men decide to put an end to a generational feud, and die shortly after their disagreements are resolved without even witnessing the exchange.
What is irony?
Irony in its broadest sense is the juxtaposition of what appears to be on the surface and what is or is expected to be. It is an important rhetorical and literary technique. Sarcasm can be divided into several types, including verbal sarcasm, dramatic sarcasm, and circumstantial sarcasm.
Therefore, The 3 examples of irony in The Interlopers are:
Death by Nature, Call for Help, Forgiveness.
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objects x and y are connected by a string of negligible mass and suspended vertically over a pulley of negligible mass, creating an atwood’s machine, as shown in the figure. the objects are initially at rest, and the mass of object y is greater than the mass of object x. as object y falls, how does the kinetic energy of the center of mass of the two-object system change? justify your selection. all frictional forces are considered to be negligible.
The kinetic energy increases because the gravitational force due to Earth does positive net work on the system.
What is law of conservation of energy?Energy cannot be created or destroyed, according to the law of conservation of energy. However, it is capable of change from one form to another.
When objects x and y are connected by a string of negligible mass and suspended vertically over a pulley of negligible mass, the system stored gravitational potential energy. When object y falls, this potential energy changes into kinetic energy.
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How does the mass of the sodium metal and chlorine gas involved in the reaction, compare to the mass of the table salt produced?.
According to the law of conservation of mass, the total mass of reactants and products in a chemical reaction is equal.
In a chemical process, the total mass of the reactants will be much smaller than the total mass of the products. A. Sodium metal and chlorine gas combine to generate sodium chloride in the chemical reaction shown below. will be 100 grammes exactly.
Chlorine gas and sodium metal combine to form sodium chloride (table salt) The mass of sodium chloride generated when the reaction is finished will be exactly 100 grammes if the combined mass of the reactants is 50 grammes.
A sodium cation (Na+) and a chloride anion are created when a sodium atom transfers an electron to a chlorine atom.
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How much of a company's emissions are Scope 3?
On average, firms emit 75% of their total greenhouse gas emissions under Scope 3. According to the CDP, a company's emissions typically make up 75 percent of Scope 3 emissions.
What are emissions under Scope 3?Scope 3 covers emissions that come from assets up and down the firm's value chain, but not from the company itself or as a result of their ownership or control of those assets.
How many different Scope 3 emission categories are there?Although not every category will be applicable to all enterprises, the GHG Protocol lists 15 categories of scope 3 emissions. Scope 3 emission sources comprise emissions from both the organization's operations upstream and downstream.
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What are the 7 wavelengths?
They are: radio waves, microwaves, ir, visible, ultraviolet, x-rays, and gamma rays.
Which order do the seven wavelengths go in?The following list of the seven electromagnetic waves is organized by decreasing wavelength & increasing frequency and energy:X-rays, gamma rays, UV rays, visible light, radio waves, microwaves, and infrared waves.
What kinds of wavelengths are there?Typically, electromagnetic radiation is divided in radio wave, microwave, ir, visible light, ultraviolet, X-rays, and gamma rays categories based on its wavelength.
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What are the 15 categories of Scope 3 emissions?
Scope 3 Purchased goods and services, capital goods, fuel- and power activities, transportation and distribution, waste produced throughout operations, business trips, employee commuting, leased assets, processing of sold goods, use of sold goods, end-of-life treatment of sold goods, franchises, and investments are just a few of the three emission categories.
There are how many separate Scope 3 emission categories?twenty groups Although not all businesses would fit into every category, the GHG Protocol defines 15 classifications for scope 3 emission. Upstream and downstream of a organization's operations are both considered sources of emissions within Scope 3.
Which emission categories are there?Explained: emission types 1, 2, and 3.The primary GHG Protocol business standard divides a firm's greenhouse gas emissions into three categories. While reporting for scopes 1 and 2 is required, monitoring for scope 3 is optional and more difficult.
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What does the subscript 2 indicate in br2?
The subscript 2 in [tex]Br_2[/tex] indicates that two atoms of bromine are joined together.
[tex]Br_2[/tex], which is a bromine compound, is formed by the combination of two bromine atoms.
At normal temperature and pressure, the original colour of Bromine ([tex]Br_2[/tex]) is a red-brown liquid.
When there is a subscript "2," it signifies that a molecule is made up of two Bromine atoms.
We never use subscripts of "1" while writing the chemical formula, since they are only used when more than one atom is being represented.
When referring to a diatomic molecule, we use the element's symbol and add the subscript "2" to denote the bond between two of that element's atoms.
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Let's try to do this math ourselves from this point. Notice how the s2 term in the acceleration (5 m/s2) and the s term in the time (7 s) cancel leaving you with m/s (velocity).
122 m/s
244 m/s
8.7 m/s
35 m/s
As per the given statement the s2 term in the acceleration (5 m/s2) and the s term in the time (7 s) cancel leaving you with 35 m/s (velocity).
What is velocity?Velocity is the rate of change of speed per unit time. It also determines the direction of the movement of object or moving body. hence, it is called as directional speed.
In its basic form, speed is a scalar quantity. In essence, velocity is a vector quantity. It is the speed at which distance changes. It is the displacement change rate.v=Δx/Δt where v= average velocity, Δx=displacement, Δt=change in time.To know more about velocity visit
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The length of the minute hand of the wall clock is 10 cm. How far will the endpoint of this pointer travel in 2 hours?
please help me
The length of the minute hand of a wall clock is not relevant to finding the distance traveled by the end of the pointer in a given amount of time. The only important factors are the length of the hour hand and the amount of time that has passed.
If the length of the hour hand is X cm, then the distance traveled by the end of the pointer in 2 hours can be calculated as follows:
Distance traveled = (X * π * 2) cm
Here, π is the mathematical constant approximately equal to 3.14. The factor of 2 in the formula represents the number of hours that have passed. Therefore, to find the distance traveled in 2 hours, you would need to know the length of the hour hand and substitute it for X in the formula above.
what characteristic of the air track is important to this experiment? the air track blows air to maximize friction so that the cart motion is one-dimensional. the air track provides air flow to support the frictionless rotation of the pulley. the air track has low friction with the carts so that non-conservative forces (such as friction) are minimized. the air track is massless so that the motion of the track does not affect our measurement.
An experimental tool known as an air track enables the investigation of motion with the least amount of frictional disturbance. It is made out of a track with several tiny holes through which air is constantly blown.
What purpose does air track serve?A scientific tool called an air track is used to investigate motion in a low-friction setting. Its name is derived from the way it is built: air is pumped through a hollow track with tiny holes spaced out along the track to allow specially designed air track cars to float along with little resistance.
Why is it critical to level the air track before doing the experiment?It will be required to level the air-track as carefully as possible in order to examine motion with constant velocity.
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the Earth is on average 150 million km from the sun calculate its average speed in orbit?
Answer:
Orbital velocity of earth is 2.89 × 10⁵ m/s
Explanation:
What is the process of splitting light called?
The dispersion of white light into its various colors is referred to as dispersion. Due to the medium's refraction property, each wavelength moves through the medium at a different pace, producing this property.
What is the term for the splitting of light?Dispersion is the name for the process through which visible light separates into its individual colors.
What splits the light, and why?We have seen that when white light is transmitted through a glass prism, it is scattered into the spectrum of colors that make up white light. Therefore, we can observe that the phenomena of light separating into its individual hues is called dispersion of light.
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