Is it true that a block of plastic released under water comes up to the water's surface?

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True

False

answer is A.

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Detailed Solution

The above statement is True. An object floats or sinks in a liquid depending upon the density of the object and liquid. If the density of an object is more than the liquid, it sinks underwater. Similarly, an object with low density compared to the density of liquid floats on the water's surface. For example, a plastic block has a lower density than water density. Hence block of plastic will float on water. This is because the buoyant force on the block is more than the weight accelerated in an upward direction, and the block comes up to the surface of the water and floats on the surface.

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