A dolphin located in seawater at a temperature of 25 degc, Ask an Expert

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Q. A dolphin located in seawater at a temperature of 25°C emits a sound directed toward the bottom of the ocean 200 m below. How much time passes before it hears an echo?

Q. A billiard ball moving east at 5.00m/s strikes a stationary ball of the same mass in a toatlly elastic collion. after the collison the fisrt ball moves at 4.33 m/s at an angle of 30.0 degrees north of east. find the velocity of the second ball after the collision.

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Category:- Physics
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