1. Determine the force that a 75kg man exerts on the floor of an elevator. (a) When it ascends with a constant speed of 1.2m/s
(b) When it descends with a constant acceleration of 2m/s2 and
(c) When it ascends with a constant acceleration of 2m/s2​

1) when you rub your hands together quickly, the kinetic energy is converted to mechanical energy.2) thermal energy from the sun travels to earth as infrared waves.3) energy is transferred through the matter of space by electromagnetic waves. 4) when a match is burned, chemical potential energy is converted to thermal and radiant energy. 5) seismicwaves are caused by back and forth movement , or vibration, of an object. 6) mechanicalenergy in an engine changes thermal energy into kinetic energy to make a car move.

The purpose of a lab is to do your "expirements" the importance of the topic is so you can now what the story is about and the last one is because no one is me with my question ( what is 3 over 4 x - 9 = 27 maybe you can )

You would need to take a picture so i can see

Sublimation- which change of state is shown in model