if a gas at 315k has a volume of 1.50l, what is the volume of the gas when the temperature is reduced to 215k

The kinetic energy does the work that crushes the car’s crumple zones.

Conversion of collision energy Because the metal plastic deformation after the impact greatly increases the internal energy of the automobile, the majority of the kinetic energy in the collision process is turned into internal energy. Other types of kinetic energy are turned into heat energy, sound energy, and so on.

A serious vehicle accident can result in PTSD, acute anxiety, sadness, and crippling phobias. According to studies, crash-related mental traumas might have symptoms that continue up to a year following a car accident, especially in youngsters. Objects with potential energy, or stored energy, collide, and the energy transfers to kinetic energy, or the energy of an object in motion. This energy transfer from one to anotheanother


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Answer:

The number of charges is 1.25 × 10¹⁰

Explanation:

Current is the amount of charge flowing through a conductor per second. The formula for current (I) is given as:

I = Q/t

Where Q is the charge flowing in coulombs and t is the time taken in seconds.

Given that I = 2.0 nA = 2 × 10⁻⁹ A and t = 1 sec

I = Q / t

Q = It =  2 × 10⁻⁹ × 1 =  2 × 10⁻⁹ C

Since each charge = 1.6 x 10⁻¹⁹ C, therefore:

The number of charges = 2 × 10⁻⁹ C / 1.6 x 10⁻¹⁹ C = 1.25 × 10¹⁰

The commutator reverses the flow of current in an electric motor.

In an electric motor, the commutator plays a crucial role in reversing the direction of the current flowing through the motor's coils. The commutator is a segmented metal ring that is typically made of copper or a copper alloy. It is mounted on the rotor or armature shaft of the motor.

As the rotor spins within the motor's magnetic field, the commutator brushes, which are usually made of carbon or graphite, maintain contact with the segments of the commutator. These brushes provide the electrical connection between the motor's power supply and the rotating coils on the armature.

The commutator segments are arranged in such a way that they ensure the current flow through the motor's coils is reversed at the appropriate moments. This reversal of current direction in the coils creates a changing magnetic field, which interacts with the fixed magnetic field of the motor, resulting in the rotation of the rotor.

By reversing the flow of current in the coils, the commutator allows the motor to continuously rotate in a single direction. Without the commutator's function of reversing the current, the motor would not be able to generate continuous rotational motion.

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Answer:

The commutator reverses the flow of current in an electric motor.

Explanation:

I got it right

True, properly worn safety belts mean having both straps snugly fit to transfer the impact of a collision to the parts of your body that can withstand it, your hip and shoulder bones.

Wearing safety belts properly is essential for maximizing their effectiveness in protecting occupants during a collision. When safety belts are worn correctly, both straps should be snugly fitted to distribute and transfer the impact forces of a collision to the body's strongest parts, namely the hip and shoulder bones.

The hip bones are strong and designed to bear weight and withstand impact, making them an ideal point of contact for distributing the forces exerted on the body during a collision. By securing the lap belt tightly across the hips, it helps prevent the body from sliding forward or being ejected from the vehicle.

Additionally, the shoulder belt should be properly adjusted to fit snugly across the collarbone and chest. This positioning helps distribute and absorb the impact forces over a larger area, reducing the risk of severe injuries to the upper body.

By wearing safety belts in this manner, the forces generated during a collision are absorbed and transmitted to the body's stronger skeletal structures, reducing the likelihood of serious injuries to vital organs and vulnerable body regions. Therefore, the statement is true that properly worn safety belts should have both straps snugly fit to transfer the impact of the collision to the hip and shoulder bones.

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Answer:

C. Positively charged

Explanation:

The plum pudding model of the atom proposes by J. J. Thomson consisted of electrons which lay embedded as the raisins within a dough or soup that was positively charged. The electron was discovered by J. J. Thomson in 1897 through cathode ray tube experiments.

Based on the plum pudding model, if all the negatively charge electrons contained in an atom are removed, the material remaining will be the positively charged soup

If a teacher wanted to be as exact as possible in recording frequently occurring aggressive behaviors such as hitting, kicking, and biting during a 20-minute activity period, the recording procedure that the teacher should use is Interval recording technique.

The interval recording technique is a behavior observation method that entails determining whether specific behaviors occur or not. The observation period is divided into intervals, each lasting a specific amount of time. At the conclusion of each period, the observer records whether or not the behavior occurred during that period. This method is commonly used to determine whether a behavior occurs frequently or not.

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The speed of the other object formed is 4.8 m/s.

The change in kinetic energy is 9.84 J.

Mass of the first object, m₁ = 3 u

Velocity of the first object, v₁ = 0.8 c

Mass of the second object, m₂ = 4 u

Velocity of the second object, v₂ = 0.6 c

Mass of the object at rest, m' = 6 u

a) According to the conservation of momentum,

m₁ + m₂ = m'+ m

So, m = (3 + 4) - 6

m = 7 - 6 = 1 u

m₁v₁ + m₂v₂ = (m x v) + (m' x v')

(3 x 0.8) + (4 x 0.6) + (1 x v) + (6 x 0)

Therefore, the speed of the other object formed is,

v = 2.4 + 2.4

v = 4.8 m/s

b) The change in kinetic energy is given by,

E = KE - (KE₁ + KE₂)

E = 1/2mv² - (1/2m₁v₁² + 1/2m₂v₂²)

E = 1/2(mv² - m₁v₁² - m₂v₂²)

E = 1/2[(1 x (4.8)² - 3 x (0.8)² - 4 x (0.6)²]

E = 1/2(23.04 - 1.92 - 1.44)

E = 1/2 x 19.68

E = 9.84 J

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Answer: Most likely purple

Explanation:

Answer:

Purple?

Explanation:

I'm confused what you are asking.

The distance between the second and third dark lines of the interference pattern is 1mm.

Interference in physics is a phenomena when two waves merge by combining their displacements at each and every point in space and time to produce a new wave that has a higher, lower, or same amplitude.

The required distance= one fringe width

= ω = λ D/ d

= ( 600 × 10⁻⁹ ) ( 0.75 ) /0.45 × ( 10⁻³)

=(600×10⁻⁹)(0.75)/0.45×(10⁻³)

= 10 × 10⁻⁴

= 1mm.

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It takes the ball 3.06 seconds to reach its highest point

The time it takes for a ball to reach its highest point is given by the equation:

t = v / g

where

In this case, the initial velocity is 30.0 m/s and the acceleration due to gravity is \(9.8 m/s^2\). Therefore, the time it takes for the ball to reach its highest point is:

\(t = 30.0 m/s / 9.8 m/s^2 = 3.06 s\)

Therefore, it takes the ball 3.06 seconds to reach its highest point.

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The source of energy for the rebound of the balloon when it hits the ground is the potential energy that was stored in the balloon's compressed air.

When the balloon hits the ground, the compressed air inside the balloon undergoes a sudden compression, which increases its pressure and temperature. This increase in pressure and temperature causes the air molecules to expand rapidly, pushing against the walls of the balloon and causing it to rebound slightly. This rebound is a result of the conversion of potential energy stored in the compressed air to kinetic energy, which causes the balloon to bounce back.

In summary, the rebound of the balloon when it hits the ground is due to the conversion of potential energy stored in the compressed air to kinetic energy.

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Answer:

true

Explanation:

i know this im in 6th grade

This is True. Gases spread around freely and take up any available space. For example, there is oxygen. Oxygen is a gas we breathe in and spreads around freely, taking up any space.

Each tic mark indicates a time period of 9 seconds if the scale on the horizontal axis has a division of 9 seconds. As a result, the third tic point on the horizontal axis would denote the following period of time:

3 x 9 s = 27 s

Hence, 27 seconds are indicated by the third tic point on the horizontal axis.

It is true! The third tic point would represent three times nine seconds, or 27 seconds, as each tic mark on the horizontal axis denotes a time interval of nine seconds.Each tic mark indicates a time period of 9 seconds if the scale on the horizontal axis has a division of 9 seconds. As a result, the third tic point on the horizontal axis would denote the following period of time:Hence, 27 seconds are indicated by the third tic point on the horizontal axis.

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Answer:

A

Explanation:

The officer would have had permission regardless of anything else, kind of like letting someone into your house.

The mixing ratio is 6.

To find the answer, we have to know about the mixing ratio.

                         \(Rh=\frac{w}{w_s} *100\)

where; w is the mixing ratio and w(s) is the saturation mixing ratio.

                                    \(Rh=25\\w_s=24\)

                            \(w=\frac{Rh*w_s}{100} =\frac{25*24}{100}=6\)

Thus, we can conclude that, the mixing ratio is 6.

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Answer:

A. 7cm

I hope it helps...

Answer:

2 ammeter

Explanation:

=current=charge/time

=20/10

=2

Answer:

Explanation:

Easy!(assuming it's a horizontal spring)

Fs = kx

27N = k(4.4cm)

k = 118.8N/m

Us = k * x^2 / 2

Us = 118.8N/m * 0.035m^2 / 2

Us = 0.072Nm(J)

Answer:

6 m/s^2

Explanation:

F = ma

60N = (10 kg)a

a = 6m/s^2

23546 N force would be required to cause the same acceleration on a car of mass 3050 kg.

Given data :

m = 2150 kg

Vi = 19.3 m/s

F = - 8520N

Δt = 2.5 s

Vf = ?

F = Δp / Δt

= Δp = FΔt  

= mVf - m Vi = FΔt  

= ( 2150 kg) Vf - ( 2150 kg) x (19.3 ) = ( - 8520) x ( 2.5)

=( 2150 kg) Vf - 41495 =  -21300

= ( 2150 kg) Vf = 20195 kg m/s

Vf = 20195 / 2150 = 9.39 m / s

a) how much force would be required to cause the same acceleration on a car of mass 3050 kg?

Given data :

m = 3050 kg

F = ?

Vi = - 19.3

Vf = 0 m / s

Δt  =2.5 s

F = Δp / Δt

F = mVf - m Vi / Δt

= ( 3050 x 0) - ( 3050 x -19.3) / 2.5

= 23546 N

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Answer:

5.327 N-s

Explanation:

uwu

The initial speed of the ball was approximately 39 m/s

We can use the kinematic equations of motion to solve for the initial speed of the ball. Since the ball is thrown at an angle of 45° to the ground, we know that its initial vertical velocity is equal to its initial horizontal velocity. We can use this fact to break down the initial velocity vector into its horizontal and vertical components.

Let's use the following variables:

v0: initial speed of the ball

θ: angle of the ball's initial velocity (45° in this case)

d: distance the ball travels (81 m in this case)

g: acceleration due to gravity (9.8 m/s^2)

Using the kinematic equation for the horizontal distance traveled by an object, we have:

\(d = v0*cos(θ)*t\)

where t is the time it takes for the ball to travel the distance d. Since the ball is thrown at 45°, we have:

\(cos(45°) = √2/2\)

Substituting this into the equation above, we get:

d = v0*(√2/2)*t

Using the kinematic equation for the vertical displacement of an object, we have:

\(y = v0*sin(θ)*t - (1/2)gt^2\)

where y is the maximum height reached by the ball. Since the ball is thrown at 45°, we have:

sin(45°) = √2/2

Substituting this into the equation above, we get:

y = (v0*√2/2)\(*t - (1/2)gt^2\)

Since the ball is thrown at an angle of 45°, the time it takes for the ball to reach its maximum height is equal to half the total time of flight. Therefore, we can express t in terms of d and v0 as:

t = d / (v0*cos(θ))

Substituting this expression for t into the equation for y, we get:

y = (v0√2/2)(d / (v0cos(θ))) - (1/2)g(d / (v0cos(θ)))\(^2\)

Simplifying, we get:

y = (dsin(θ)√2)/(2cos\(^2(θ)) - (gd^2)/(2v0^2cos^2\)(θ))

Since we want to find v0, we can rearrange this equation to isolate v0:

v0 = √((gd\(^2)/(2ycos^2(θ)) - (d^2)/(4cos^4(\)θ)))

Plugging in the given values, we get:

v0 = √((9.8 m/\(s^2)(81 m)^2 / (2(0 m)(cos^2(45°))) - (81 m)^2 / (4(cos^4(\)45°))))

v0 ≈ 39 m/s

Therefore, the initial speed of the ball was approximately 39 m/s.

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Both the average and instantaneous velocities well be same over the given interval if the acceleration is zero.

Instantaneous velocity is the rate of differential change of displacement with respect differential change in time. Mathematically -

v = dx/dt

Given is the acceleration of a school bus over a given time interval as zero.

For acceleration over a given time interval to be zero, it must be ensured that the the velocity of the object should remain constant. Mathematically-

a = (v - u)/(t₂ - t₁)

For acceleration [a] = 0, v = u. Therefore -

a = 0

The instantaneous velocity for zero acceleration between the time interval t₁ to t₂ will be equal to initial velocity only -

dx/dt = u          

This will be the instantaneous velocity and is equal to (u) at any instant.

Now -

dx = u dt

Integrating both sides, we get -

∫dx = ∫u dt

x = ut

Therefore, the average velocity will be =

v(avg) = x/Δt = ut/Δt

Now -

t = Δt for any specific time interval. Therefore -

v(avg) = ut/t = u

This is the average velocity and it is equal to (u).

Therefore, both the average and instantaneous velocities well be same over the given interval if the acceleration is zero.

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It is more difficult to get the object to move or keep moving on a rough surface.

The term friction has to do with the opposition to the motion of an object. We know that friction could lead to a reduction in the speed of the object. If the surface is so rough, the motion an object would be difficult due to a greater resistive force that keeps the object from moving.

We can then see that it would be more difficult for the object to begin to move on the rough surface rather, motion could easily start and be sustained on quite a smooth surface as we can see.

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On a rough surface, it is more challenging to move or maintain the motion of the object due to friction between the object and the surface due to contact.

An object experiences a push or pull as a result of interacting with another object. Each object is subject to a force whenever two objects interact.

According to newton's law, an object tries to maintain its position whether it is at resting or it is in motion. If the body is at rest then it tries to maintain its rest position and if the body is in motion then again it tries to maintain its motion. So, if the box is at rest, it is difficult to move the box in starting because of inertia, but once it is in motion it is easy to keep on going with the flow.

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Answer:

KE = 1/2(m)(v^2)

Explanation:

Answer:

I hope this helps

Explanation:

Answer:

95ms answer because I am always right please mark me as brainlest

Answer:

the density is mass over volume, so you divide 125g over 25 cm3, giving a result of 5 g/cm3

Answer:

The density is mass over volume

so you divide 125g over 25 cm3

giving a result of 5 g/cm3

you welcome have a good day!

1c 2c 3a 4a 5d

Explanation:

I just know.

ur welcome.

eeee

Answer:

mass goes down volume remains the same