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2 years ago

Two identical cars, each traveling at the same velocity, and having the same mass come to a stop

Physics

1 answer:

olya-2409 [2.1K]2 years ago

4 0

Answer:

The second option - same change in momentum, different force

Explanation:

They experience the same change in momentum, but the force on car A is greater.

p=m*v

Impulse, or change in p=F*t

We know the cars have the same change in momentum, because they both go from the same initial momentum (p=mv), to zero momentum. Therefore, both experience the same change in momentum. Since the time is different, but the change in momentum is the same, the force has to be different.

For example: if both cars had 200 kg*m/s of momentum at the start, and 0 at rest, the impulse is 200 kg*m/s

So,

p(a)= 200=F(0.3)

p(b)= 200=F(5)

Which force has to be greater to make the equations true? The force for Car A, of course!

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So we can conclude that the relationship between energy and motion in the process is directly proportional to each other.

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2 years ago

A certain radar installation tracks airplanes by transmitting electromagnetic radiation of wavelength 4.0 cm.

Anna35 [415]

the wavelength equation is

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2 years ago

Read 2 more answers

The igneous rocks which were deposited on the surface and then cooled are known as __________.

mr Goodwill [35]

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3 years ago

You have an electrically neutral toy that you divide into two pieces. You notice that at least one of those pieces has an electr

den301095 [7]

Answer:

The pieces will attract one another

Explanation:

From the law of conservation of energy, we know that energy can neither be created nor destroyed, but transformed. If one piece of the toy that was neutral ends up having an electric charge (positive or negative), from the conservation of energy, the other piece must have a charge opposite to that on the other charged piece but equal in magnitude. These two pieces which are oppositely charged attracts each other, this shows that electric charge is conserved.

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3 years ago

Intersystem crossing is:

Semenov [28]

An intersystem crossing (ISC) is a non-radiative process that involves the transition between two electronic states with different spin multiplicity. That is, when an electron is excited in a molecule in a basal singlet state (either by absorption or radiation) into a state of greater energy, an excited singlet or triplet state can be obtained.

Therefore, ISC is understood as an a non radio active transition between states with different spin multiplicity.

Correct answer is C: a radiative transition between states with the same spin.

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3 years ago