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Katena32 [7]
3 years ago
9

A roller coaster starts from rest at point a and continues to point b on a frictionless track. what best describes the changes i

n kinetic and potential energy as the car travels from point a to point b?
Physics
2 answers:
IceJOKER [234]3 years ago
5 0

Took a wild guess and got it correct. The answer is B Kinetic Energy increases and potential energy decreases.

saw5 [17]3 years ago
3 0

<span>At first when the car is at the datum point where is no elevation, the kinetic energy increases while the potential energy is zero. As it travel the path and goes upward the kinetic enrgy decreases while the potential energy increases. When it goes down again the kinetic enrgy increases again while the potential energy decreases </span>

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Answer:

Frequency, f=2.30\times 10^{18}\ Hz

Explanation:

Given that,

The wavelength of the x-rays, \lambda=0.13\ nm=0.13\times 10^{-9}\ m

We need to find the frequency of an x-ray. All electromagnetic wave travel with a speed of light. It is given by the formula as :

c=f\lambda

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f=\dfrac{c}{\lambda}\\\\f=\dfrac{3\times 10^8}{0.13\times 10^{-9}}\\\\f=2.30\times 10^{18}\ Hz

So, the frequency of an x-ray is 2.30\times 10^{18}\ Hz. Hence, this is the required solution.

5 0
3 years ago
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azamat

Answer:

0

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2 years ago
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6 0
3 years ago
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Tpy6a [65]

Explanation:

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