A0.500 cm diameter plastic sphere, used in a static electricity demonstration, has a uniformly distributed 40.0 pc charge on its surface. what is the potential near its surface?

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.

Why don't you see your reflection in water with waves or repples

Ineed with my physics homework i can’t find it on google