Wood overboard!
 Fred |
 Lilly |
„Now we take a look at the wooden beam:
Due to the reason that it falls into the water and floats on the water, it displaces ...“
a) exactly 50 kg of water.
b) considerably less than 50 kg of water.
Due to the reason that it falls into the water and floats on the water, it displaces ...“
a) exactly 50 kg of water.
b) considerably less than 50 kg of water.
„
This fact was already found out by Archimedes. Therefore, this principle is called Archimedes' principle.
If we considered only the wooden beam, the water level would rise.“
If we considered only the wooden beam, the water level would rise.“
„Let's summarise:
Because the wooden beam is not on the ship anymore, the ship looses 50 kg of its weight and therefore does not displace these 50kg of water. Therefore, the sea level sinks as if we had taken away 50 kg of water.“
Because the wooden beam is not on the ship anymore, the ship looses 50 kg of its weight and therefore does not displace these 50kg of water. Therefore, the sea level sinks as if we had taken away 50 kg of water.“
„
Exactly! And the wooden beam which floats on the water displaces exactly 50 kg of water. The sea level rises as if we have added 50 kg of water.
“
„This would mean, that the sea level does not change if the wooden beam floated on the water. “
„Right! I think we can now solve the riddle of the pirate if we adapt our considerations to the gold coin.“
„But take care! There is a difference between the golden coin and the wooden beam ...“
