Answer:
Explanation:
If v be the velocity just after the rebound
Kinetic energy will be converted into potential energy
1/2 m v² = mgh
v² = 2gh
v = √ 2gh
= √ 2 x 9.8 x .96
= 4.33 m / s
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Answer:
719
Explanation:
Conversion
1 picometer (pm) is equivalent to
meter
1 micrometer is equivalent to
meter
To find the number of layers, we divide the overal leaf thickness by the thickness of one atom hence dividing tex]0.125 × 10^{-6}[/tex] meter by
meter we get that the number of sheets will be as follows

Therefore, they are approximately 719 sheets
S=7400mi
t=3 min= 0.05h
v=7400mi/0.05h
v=148000mph