Question: 1) A short blast is emitted somewhere between two reflecting cliffs. Two echos are heard, once at 0.6 sec and the next at 0.9 sec.

1) A short blast is emitted somewhere between two reflecting cliffs. Two echos are heard, once at 0.6 sec and the next at 0.9 sec. Given the speed of sound is 330 m/s, how far apart are the reflecting cliffs?

2) An object of mass 2 kg is thrown straight upward with a velocity of 10 m/s. Neglecting air resistance, how high does the object go?

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