CannonballScience brain teasers require understanding of the physical or biological world and the laws that govern it.
A person in a boat drops a cannonball overboard; does the water level change?
HintThe cannonball in the boat displaces an amount of water equal to the mass of the cannonball.
AnswerThe cannonball in the boat displaces an amount of water equal to the MASS of the cannonball. The cannonball in the water displaces an amount of water equal to the VOLUME of the cannonball. Water is unable to support the level of salinity it would take to make it as dense as a cannonball, so the first amount is definitely more than the second amount, and the water level drops.
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