Interview Question

Electrical Engineer Interview

-Allentown, PA

Lutron

A boat is in a swimming pool and there is a rock in the boat. What happens to the level of water if the rock is thrown out of the boat?

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5 Answers

4

Any rock that will have the density less than water?... It will fall because due to Achimedes' Law the total bouyant force decreased, hence so it is with the volume of space occupied below the water level.

Anonymous on

0

It depends on the ratio of volume of the rock vs the displacement of water. This is dependent on the density of the substance. In the boat it should displace a volume of water greater than the volume of the rock since the density of the rock is greater than the density of the water. Once in the water it should displace only it's own volume which do to it's density is less than the water it had to displace while in the boat.; hence, the water level decreases.

TRENT I. BERGEN on

11

It depends on the density of the rock If the rock sinks: the water level actually falls....think about it...but this is the right answer.

Anonymous on

0

level of water increase

sidd on

0

Stays the same (see ice melting in water physics problem; buoyancy)

Moises on

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