Service engineer intern interview questions shared by candidates
You are in a boat which is in the middle of a pond and you are holding a rock in your hand. You throw the rock into the lake. Does the water level of the lake rise?
No right or wrong answer. They just want to see how you think.
The water level will drop. When you hold the rock, the extra displaced volume of water equals the weight of the rock. When you throw the rock into the lake, displaced volume is the size of the rock, which is less.
both wrong. the water level does not change. at first the density the boat has is density of the boat + density of rock affecting water level. in the final situation the boat has gotten rid of the rock's density, but the rock (and its density) have been added to the lake, so we still have density of boat + density of rock affecting water level. location doesn't change physics.
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