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3 years ago

7

A perfect bouncy ball would continue bouncing the same height forever. But in reality, the ball stops bouncing because energy is

"lost" to ...
A.sound energy
B.compression of the ball
C.heat energy absorbed by the ball
D.all answers are true

1 answer:

galina1969 [7]3 years ago

6 0

Answer:

D. all answers are true

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There is a small scratch on a disco record located 14.5 cm from the center. When played, the scratch makes the record skip 30 ti

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Answer:

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Explanation:

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$Angular \ velocity, \ w \ = \frac{2 \pi \times RPM}{60} \\$

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$r = radial \ distance \\$

$v = \pi \times 14.5 \\$

$v = 45.55 cm/dec$

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