If a 65-kilogram student exerts a force with a magnitude of 100 n on a 100-kilogram desk the magnitude of the force that the desk exerts on him is a.100 n b.100 n more than his weight c.0 n d.100 n less than his weight save

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

Light that is polarized along the vertical direction is incident on a sheet of polarizing material. only 96% of the intensity of the light passes through the sheet and strikes a second sheet of polarizing material. no light passes through the second sheet. what angle does the transmission axis of the second sheet make with the vertical?

What is an electric motor? explain its operation. 2-3 sentence