A sample of mercury metal is cooled from 52.5C to 25.0C. In the process, 766J of heat is released. What is the mass of mercury that was in the sample? The specific heat capacity of mercury is 138J/kgC.

How much work is done lifting a 9.10 kg box straight up onto a shelf that is 1.80 m high?

The plum pudding model of the atom state that ?

This is important 1. what happens to the speed of molecules in water vapor when it condenses to form a liquid? (2 points) the molecules slow down. the molecules speed up. the molecules slow down and then speed up. the molecules speed up and then slow down. 2. how might human activities change to compensate for a decrease in water supplies? (2 points) humans might build a factory. humans might build drainage systems. humans might extract more water from the ground. human behavior does not change because of the water cycle. i'll be grateful if anyone can answer these 2 questions !