Sunday, February 28, 2010
♥ REFLECTION ON DENSITY
Why and How Did the Density Of The water change when salt was added?
Ans: It raises the density by adding more mass, to the same volume of water. Adding salt to one cup of water will raise the density because the salt is adding mass to the same amount of volume of the cup of water. Salt increases the density of water. Pure water density: 1000 kg/m3 Salt water density: 1027 kg/m3 (at sea surface)
Now, try to explain why the egg sunk in salt water but not tap water
Ans: The density of the egg is higher than the density of tap water, so it sinks. Adding salt to the water increases the density of the water, because the salt increases the mass without changing the volume very much. With enough added salt, the saltwater solution density is higher than the egg's, and the egg will then float.
Ans: It raises the density by adding more mass, to the same volume of water. Adding salt to one cup of water will raise the density because the salt is adding mass to the same amount of volume of the cup of water. Salt increases the density of water. Pure water density: 1000 kg/m3 Salt water density: 1027 kg/m3 (at sea surface)
Now, try to explain why the egg sunk in salt water but not tap water
Ans: The density of the egg is higher than the density of tap water, so it sinks. Adding salt to the water increases the density of the water, because the salt increases the mass without changing the volume very much. With enough added salt, the saltwater solution density is higher than the egg's, and the egg will then float.
5:26 PM
