If a car has a momentum of 2.04 x 104 kgm/s and a velocity of 18 m/s, what is its mass?

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.

Suppose while hauling rocks, you accidentally drop one. it breaks apart in flat, planar sections. what type of rock did you just drop? 20 points

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?