Brain Teasers
Cannonball
A person in a boat drops a cannonball overboard; does the water level change?
Hint
The cannonball in the boat displaces an amount of water equal to the mass of the cannonball.Answer
The 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.Hide Hint Show Hint Hide Answer Show Answer
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