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seraphim [82]
3 years ago
11

1. The asthenosphere and lithosphere are parts of Earth's

Physics
1 answer:
miss Akunina [59]3 years ago
7 0

did you tried first if you did I can help

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The radiations detected by Arno Penzias and Robert Wilson
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4. A disobedient student dropped his Physics textbook (mass 0.1kg) from the window (15m above the ground). How fast was it going
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Answer:

v= 17.15 m/s

Explanation:

mass of the book=0.1 Kg

height above ground, h= 15 m

Using conservation of energy

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mgh = \frac{1}{2}mv^2

v=\sqrt{2gh}

v=\sqrt{2\times 9.8\times 15}

v=\sqrt{294}

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Hence, the book will hit the ground at the speed of 17.15 m/s.

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