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zzz [600]
3 years ago
14

The picture shows a roller coaster track with two hills of equal height. A motor uses electric energy to pull the roller coaster

cars by a chain to the top of the first hill. While the cars are moving up the hill, what energy transformations occur? When the cars get to the top of the first hill, has any energy entered the roller coaster system? If so, what kind?
Physics
2 answers:
zimovet [89]3 years ago
6 0

Answer: When the cars move up the hill, electric energy changes to kinetic energy and kinetic energy changes to potential energy. Yes, energy entered the system as potential energy.

Explanation:

JulsSmile [24]3 years ago
6 0

Answer:

Yes, it has. When the cars move up the hill, electric energy changes to kinetic energy and kinetic energy changes to potential energy.

Explanation:

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The wavelength of a sound wave in this room is 1.13 m and the frequency is 301 Hz.
Yakvenalex [24]

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a. 340.13 m/s b. 680.26 m/s c. our wavelength doubles

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a. speed of wave, v = fλ were f = frequency = 301 Hz and λ = wavelength = 1.13 m.

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c. If the speed of the wave is still 340.13 m/s, if we cut the frequency in half, then frequency now equals f = 301 Hz/2 = 150.5 Hz.

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