A beam of light travels through the air and strikes the surface of water at an angle of incidence of 45°. What is the angle of refraction in the water? a 33 b 16 c 28 d 45

2kg of refrigerant 134a undergoes a polytropic process in a piston-cylinder assembly from an initial state of saturated vapor at 2 bar to a final state of 12 bar, 80 degree c. a)determine the work for the process in kj. b)sketch the process on a p-v diagram.

Which two particles are found in the center of an atom

What is the speed of an object at a given moment?