Awaiter is carrying a tray above his head and walking at a constant velocity. if he applies a force of 5.0 newtons on the tray and covers a distance of 10.0 meters, how much is the work being done?

Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.

We have a colorless transparent liquid. it looks like water. we seperated it into a solid and a liquid by evaporration and condention was this a chemichal or a physical seperation a. chemical seperation b. physical seperation

What is the measure of a change in an objects velocity?