Physics
A boy sitting in an open car moving with the constant speed throws a ball straight up into the air. The ball falls

Behind him
By his side
Into his hand
In front of him

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Physics
A standing wave occurs when

The amplitude of a wave exceeds its wavelength
The speed of the wave is zero or near zero
Two waves overlap
A wave reflects upon itself

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Physics
Thermohaline circulation is mainly due to

Cold, dense ocean water sinking and warmer water replacing it
Warm water being added to the ocean due to industial waste
Winds causing circulation of ocean water
Warmer, less dense water sinking in the ocean and cold water replacing it

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