for each set of data calculate the total momentum of trolleys before collision ​

Answer:

bussy

Explanation:

shart

Answer:

its B

Explanation:

the movement of charged particles in a conductor

Charged particles move through a conductor best describes an Electric current.

A stream of charged particles, such as electrons or ions, traveling through an electrical conductor or a vacuum is known as an electric current.

Charge carriers, which can be any of a number of particle kinds depending on the conductor, are the moving particles. Electrons flowing over a wire are frequently used as charge carriers in electric circuits.

They can be electrons or holes in semiconductors. Ions are the charge carriers in an electrolyte, whereas ions and electrons are the charge carriers in plasma, an ionized gas.

Therefore, Charged particles move through a conductor best describes an Electric current.

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Answer:

B

Explanation:

You need a specific force to change the momentum of something.

Hope this helps!

ANSWER:

A. Open system

STEP-BY-STEP EXPLANATION:

When vacuuming the carpet, an exchange of matter and energy takes place between what is being vacuumed and the vacuum cleaner bag.

Therefore, we know that you are with the characteristics of an open system

Answer:

An amorphous solid does not have a definite melting point; instead, it melts gradually over a range of temperatures, because the bonds do not break all at once. This means an amorphous solid will melt into a soft, malleable state (think candle wax or molten glass) before turning completely into a liquid.

Explanation:

Hope this helps

May I get braineist pls?

Alright, alright, fam, let's dive into this problem. I'll describe how a Free Body Diagram (FBD) would look for this situation.

a) So picture it, yeah? You got your crate, right? This crate is on the ramp. The forces on the crate are:

1. **Gravitational force (Fg)**: this is the weight of the crate pulling it down towards the Earth. It equals mass times gravity, or 53 kg * 9.8 m/s^2.

2. **Normal force (Fn)**: This one's the force that the ramp is exerting back up on the crate. It's perpendicular to the surface of the ramp, not straight up.

3. **Frictional force (Ff)**: This is the force that's trying to slide your crate back down the ramp. It's always against the direction of movement, so it's downwards along the ramp.

4. **Applied force (Fa)**: This is you pushing the crate up the ramp, fam! This force is 373N, upwards along the ramp.

b) Now, let's slide into the math, okay? When you're pushing the crate up the ramp at a constant velocity, the total force acting on it is zero (it's called equilibrium, yo). This means the sum of all the forces we talked about is equal to zero.

Here's the breakdown:

1. The force you apply up the ramp (Fa) and the force of friction (Ff) that opposes the motion are balanced. So, Fa = Ff. You know Fa, it's 373N.

2. The force of gravity pulling down (Fg) gets split into two components. One part is acting down the ramp, directly opposing your applied force. The other part is acting into the ramp, which is balanced by the normal force. The part of the gravity that is acting down the ramp is Fg * sin(22 degrees).

3. At equilibrium, the force you're applying (Fa) is equal to the frictional force (Ff) plus the component of the gravitational force acting down the ramp. So, Fa = Ff + Fg * sin(22 degrees). Since you know Fa and Fg, you can calculate Ff.

4. The frictional force (Ff) is also equal to the coefficient of friction (mu) times the normal force (Fn). So, Ff = mu * Fn. You can calculate Fn from the component of gravity that's acting into the ramp, which is Fg * cos(22 degrees).

5. From the above two equations, you can find mu (coefficient of friction) as mu = Ff / Fn.

Let's calculate:

The component of gravity along the ramp is Fg_along = 53kg * 9.8 m/s^2 * sin(22 degrees) ≈ 206.7N.

The component of gravity into the ramp is Fg_into = 53kg * 9.8 m/s^2 * cos(22 degrees) ≈ 499.4N.

The force of friction (Ff) is Fa - Fg_along = 373N - 206.7N = 166.3N.

And finally, the coefficient of friction (mu) is Ff / Fn = 166.3N / 499.4N ≈ 0.33.

So there you have it, the coefficient of friction between the crate and the ramp is approximately 0.33. Keep in mind these are all approximations since we rounded off the values a little bit. Hope that's clear

Answer:

radio since they use radio telescopes.

Answer:

what is this i am in class 7 i dont know and not read yet

Answer:

The nucleus has an overall positive charge as it contains the protons. Every atom has no overall charge (neutral). This is because they contain equal numbers of positive protons and negative electrons. These opposite charges cancel each other out making the atom neutral.

Answer: 6.4

Explanation:

3.94 m/s is the linear speed of the boy at the lowest point on the swing and a 35 kg boy is on a swing at a park. the swing is supported by 2 chains, each 2.96 m long.

To find the linear speed of the boy at the lowest point on the swing, we can use the formula:
v = √(gL(1-cosθ))
where v is the linear speed, g is the acceleration due to gravity (9.8 m/s²), L is the length of the swing (2.96 m), and θ is the angle between the swing and the vertical.
At the lowest point of the swing, the tension on each chain is equal to the weight of the boy, which is:
T = mg = 35 kg x 9.8 m/s² = 343 N
So the tension on each chain is slightly less than 352 N, but we can use this value as an approximation.
The tension on each chain provides the centripetal force that keeps the boy moving in a circular path. The tension is given by
T = mv²/L
where m is the mass of the boy and v is his velocity at the lowest point.
Solving for v, we get:
v = √(TL/m) = √(352 N x 2.96 m / 35 kg) ≈ 3.94 m/s
So the linear speed of the boy at the lowest point on the swing is approximately 3.94 m/s.

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Answer:

p=1

Explanation:

Well me know that v=m/s

and that a=m/s^2

so

\((m/s)^{2} = (m/s^2)(x^p)\\\\(m^2/s^2)/(m/s^2)=x^p\\\\m^2s^2/ms^2=x^p\\\\(m^2/m)(s^2/s^2)=x^p\\\\m=x^p\\\\p=1\)

Note: We don't take into account 2 because it's a scalar, it doesn't have units so it doesn't add anything to the equation.

Answer:

Actually, the correct answer is D. The system releases 75 J of heat, and its volume doubles.

Explanation:

I took this computer-scored test, and while I was stuck on this answer for a while, I was able to get 100%. This was my thought process:

We know that molecular motion increases with an increase in temperature, because collisions increase. For that reason, for molecular motion to decrease in a system, as the question states, the system must RELEASE heat and decrease in temperature.  Additionally, when a system's volume is smaller, its molecular motion increases. This is because the molecules hit the container more easily and more often. If the volume is halved then, the molecules would have MORE motion, which we aren't looking for in this question! Therefore, the volume must DOUBLE so that less molecular motion takes place. The answer is D! :)

The mass of the second sphere is approximately 9.97 x 10^23 kg.

The gravitational force between two masses can be calculated using the formula:

F = G * (m1 * m2) / r^2

Where:

F = gravitational force

G = gravitational constant = 6.67 x 10^-11 N(m/kg)^2

m1 and m2 = masses of the two spheres

r = distance between the centers of the two spheres

In this problem, we know the following values:

m1 = 57 kg

r = 1.02 km = 1020 m

F = 1.79 x 10^-14 N

G = 6.67 x 10^-11 N(m/kg)^2

We can rearrange the formula to solve for m2:

m2 = (F * r^2) / (G * m1)

Plugging in the given values, we get:

m2 = (1.79 x 10^-14 N) * (1020 m)^2 / (6.67 x 10^-11 N(m/kg)^2 * 57 kg)

m2 = 9.97 x 10^23 kg

Therefore, the mass of the second sphere is approximately 9.97 x 10^23 kg.

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Your driver's license is at risk of being cancelled if you have more than three traffic violations in one year​. The correct option is D.

The license by the central government to an individual to travel on road by his own vehicle on terms and conditions to be strictly followed.

When a driver is moving with his vehicle and come across the traffic signal, he must follow them. If he violates the traffic signals more than three times, he will get his license cancelled.

Thus, your driver's license is at risk of being cancelled if you have more than three traffic violations in one year​. The correct option is D.

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Answer:

Electric potential energy, or Electrostatic potential energy, is a potential energy (measured in joules) that results from conservative Coulomb forces and is associated with the configuration of a particular set of point charges within a defined system.

Explanation:

The lift experienced by maglev trains is due to magnetic forces. Maglev trains, short for magnetic levitation trains, utilize magnetic forces to achieve lift and propulsion.

The principle behind maglev technology involves the interaction between magnetic fields and electric currents to generate repulsion or attraction forces. The lift experienced by maglev trains is primarily due to magnetic repulsion. The train's undercarriage contains magnets, typically superconducting electromagnets or permanent magnets, which create a strong magnetic field. The track, on the other hand, is equipped with a series of coils or magnets that produce a corresponding magnetic field. When the train moves along the track, the magnetic fields of the undercarriage and the track interact, resulting in a repulsive force that levitates the train above the track.

By effectively repelling the train from the track, the magnetic forces create a "floating" effect, reducing friction and allowing the train to move smoothly and efficiently. This enables maglev trains to achieve high speeds and provide a comfortable ride. In addition to lift, magnetic forces are also used for propulsion in maglev systems, where alternating magnetic fields push and pull the train forward. In summary, the lift experienced by maglev trains is indeed due to magnetic forces, specifically the repulsion generated between the magnetic fields of the train and the track.

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Answer:

twice

Explanation:

From magnification = height of image / height of object

Distance of image/ distance of object = magnification

If the distance and height of the object represents the initial light distance and the exposed surface respectively.

And similarly the distance and height of the image represents the final light distance and the exposed surface respectively.

Hence the new image exposure would be twice as large.

If we use the formula our point of investigation is Height of image,

H2= D2/D1× H1

H2 = 2D2/D1 × H1

H2 = 2H1

The dog MUST be SEEN by a vet.

Not on the phone, not from your description. Not a web search, and not asking for advice online.

A qualified veterinarian has to have his hands on the animal, examine the dog, and make some suggestions. It might cost some money.

There's something missing here. A qualified real vet will never just say "I don't know, good bye!".

Yes, there is a relationship between time and temperature in a hot air balloon ride, because the temperature changes as the balloon ascend or descend in the atmosphere. If height depends on time and temperature depends on the height, then it is possible to establish a relationship between time and temperature.

One way to do this would be to use the equations that describe the height and temperature as a function of time to calculate the temperature at various times during the balloon ride. For example, if the height of the balloon as a function of time is given by the equation h(t) and the temperature as a function of height is given by the equation T(h), then the temperature at a given time t can be calculated using the equation T(h(t)).

It's important to note that the specific form of the equations for height and temperature will depend on the conditions of the balloon ride, such as the rate at which the balloon ascends or descends, the atmospheric conditions, and other factors. Therefore, it will be necessary to use the appropriate equations and input values in order to accurately calculate the temperature at a given time during the balloon ride.

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If A 6.3 kg ball moving at 0.6 m/s collides with a 4.8 kg ball at rest. If the heavier ball moves at 0.25 m/s after the collision, then the lighter ball moves at 0.459 m/s after the collision.

To solve this problem, we can apply the principle of conservation of momentum. According to this principle, the total momentum before the collision is equal to the total momentum after the collision, provided no external forces are acting on the system.

The momentum of an object is defined as the product of its mass and velocity. Mathematically, momentum (p) is calculated as:

p = mass × velocity

Before the collision, the total momentum is given by:

Total momentum before = (mass of ball 1 × velocity of ball 1) + (mass of ball 2 × velocity of ball 2)

Total momentum before = (6.3 kg × 0.6 m/s) + (4.8 kg × 0 m/s) (since the second ball is at rest)

Total momentum before = 3.78 kg·m/s

After the collision, the total momentum is given by:

Total momentum after = (mass of ball 1 × velocity of ball 1) + (mass of ball 2 × velocity of ball 2)

Total momentum after = (6.3 kg × 0.25 m/s) + (4.8 kg × velocity of ball 2)

Total momentum after = 1.575 kg·m/s + (4.8 kg × velocity of ball 2)

According to the conservation of momentum principle, the total momentum before the collision is equal to the total momentum after the collision:

Total momentum before = Total momentum after

3.78 kg·m/s = 1.575 kg·m/s + (4.8 kg × velocity of ball 2)

Simplifying the equation:

3.78 kg·m/s - 1.575 kg·m/s = 4.8 kg × velocity of ball 2

2.205 kg·m/s = 4.8 kg × velocity of ball 2

Dividing both sides of the equation by 4.8 kg:

velocity of ball 2 = 2.205 kg·m/s / 4.8 kg

velocity of ball 2 ≈ 0.459 m/s

Therefore, the lighter ball (ball 2) moves at approximately 0.459 m/s after the collision.

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Water rises inside a glass tube with a narrow diameter due to the phenomenon of capillary action.

Capillary action is the ability of a liquid to flow in narrow spaces without the assistance of, or in opposition to, external forces like gravity. In a glass tube with a narrow diameter, the attractive forces between the water molecules (cohesion) are stronger than the attractive forces between the water molecules and the glass surface (adhesion). As a result, the water molecules climb up the walls of the glass tube, creating a concave meniscus and causing the water level to rise.

The height to which water rises in a glass tube is dependent on the diameter of the tube, the surface tension of the liquid, and the angle of contact between the liquid and the tube. The smaller the diameter of the tube, the higher the water will rise due to increased surface tension and greater capillary forces.

Overall, capillary action is a fundamental principle in physics and has practical applications in many fields, including biology, chemistry, and engineering.

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Using conservation of energy, the initial velocity of the puck at the bottom of the hill is 19.6 m/s.

Expecting the slope is a smooth bend, we can utilize preservation of energy to track down the underlying speed of the puck. Since there is no grating or air obstruction, the main powers following up on the puck are gravity and the typical power. Thusly, the absolute mechanical energy of the puck is saved.At the highest point of the slope, the puck has gravitational possible energy, which is changed over into active energy as it slides down the slope. At the lower part of the slope, the gravitational potential energy has been all changed over into motor energy, so we can compose:

mgh = (1/2)mv0^2

where m is the mass of the puck, g is the speed increase because of gravity, h is the level of the slope, and v0 is the underlying speed of the puck at the lower part of the slope.

Tackling for v0, we get:

v0 = sqrt(2gh)

Where sqrt addresses the square root capability.We can utilize the given distance of 7 m to track down the level of the slope:d = sqrt(h^2 + 49)

where d is the distance the puck lands from the foot of the bluff. Settling for h, we get:

h = sqrt(d^2 - 49)

Subbing this articulation for h into the situation for v0, we get:

v0 = sqrt(2g(sqrt(d^2 - 49)))

Where g is the speed increase because of gravity.Connecting the upsides of g = 9.8 m/s^2 and d = 7 m, we get:

v0 = sqrt(2 x 9.8 x sqrt(7^2 - 49)) = 19.6 m/s

In this way, the underlying speed of the puck at the lower part of the slope was 19.6 m/s.

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The phase constant, denoted as φ0, is a fundamental concept in wave analysis that describes the starting position of a wave at a given point in time. It is particularly relevant when studying sinusoidal waves like sine or cosine waves.

The phase constant is a term used in wave analysis to represent the initial phase or starting position of a wave.                                                                                                                                                                                                     It indicates the value of the phase at a particular reference point in time.                                                                                                        In simple terms, it determines where the wave begins within its oscillation pattern.                                                                                                                                                                          These waves create a repeating pattern of oscillation, and the phase constant determines where this pattern begins.   To visualize it, imagine a graph with time on the horizontal axis and wave amplitude on the vertical axis.                                            The phase constant φ0 determines the horizontal shift of the wave, indicating the position at which the wave starts.                 For instance, if the phase constant is zero, the wave starts at its highest positive amplitude.                                                                                 If the phase constant is π/2 (pi/2), the wave starts at the point where it crosses zero.                                                                                                                  And if the phase constant is π (pi), the wave starts at its highest negative amplitude.                                                                                                                                                                                                          The phase constant is typically expressed in radians or degrees, depending on the context.                                                                      It plays a crucial role in wave analysis as it influences the behavior, interference, and superposition of waves.                                                                              In conclusion, the phase constant φ0 signifies the initial phase or starting position of a wave.                                                                         It determines where the wave begins within its oscillation pattern and is a vital parameter in wave analysis.

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Answer:

it is very hard but i am trying to help you.

Explanation:

The receiver of a signal must understand the code or language being used to avoid confusion and losses.

This is usually in the form of a sound or body movement and is involved in conveying messages to people.

The receiver must understand the code or language in order to prevent confusion or loss of lives and properties.

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The mass of a diamond is 210.6 carats.

The mass of the diamond can be calculated by using the formula:

Mass = Density × Volume

Given that the density of the diamond is 3.51 g/cc and the volume is 12 cc, we can plug these values into the formula to find the mass:

Mass = 3.51 g/cc × 12 cc

Mass = 42.12 g

Therefore, the mass of the diamond is 42.12 grams.

To find the number of carats in this diamond, we can use the conversion factor that

1 carat = 200 mg.

First, we need to convert the mass of the diamond from grams to milligrams:

42.12 g × 1000 mg/g = 42120 mg

Then, we can use the conversion factor to find the number of carats:

42120 mg × (1 carat/200 mg) = 210.6 carats

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Answer:

2 minutes 20 seconds

Q. Seismic station A is 5000 kilometers from the epicenter. What is the difference between the arrival time of the first P-wave and the arrival time of the first S-wave recorded at this station? answer choices 2 minutes 20 second

Explanation: