Monday, 8 September 2014

FLOATING AND BUOYANCY


                           FLOATING AND BUOYANCY

1. What happens to the apparent weight of an object if it is lowered into water?

2. When an object if floating what is its apparent weight?

3. Does an iceberg made from pure water float lower in pure water or in ice?

4. If an ice cube that is floating in a glass of water melts the level of water in the glass stays the same. Use that fact to explain why the effect of global warming is more important on the Antarctic ice cap than the artic ice.

5. A lump of metal of volume 0.1 m3 has a weight of 3000 N in air. What is its apparent weight when it is lowered into water?  [You will need to know that the weight of 1 m3 of water is 10000 N]