3 years ago

HELP please now :(

Physics

1 answer:

Goshia [24]3 years ago

6 0

Answer:

They can predict how the ocean floor will look in the future and predict animal and plant life changes.

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A student standing on a stationary skateboard tosses a textbook with a mass of mb = 1.25 kg to a friend standing in front of him

juin [17]

Answer:

The velocity of the student has after throwing the book is 0.0345 m/s.

Explanation:

Given that,

Mass of book =1.25 kg

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Using conservation of momentum along horizontal direction

$m_{b}v_{b}\cos\theta= m_{c}v_{c}$

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Hence, The velocity of the student has after throwing the book is 0.0345 m/s.

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A string vibrates at a frequency of 20Hz. what is its period?

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We know, Period = 1/frequency = 1/20 sec.

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