Coach Pollard still thinks he is really fast and so he went out to sprint at the track meet. He ran at a velocity of 4 m/s. His mass is about 68 kg. About how much Kinetic Energy did Coach Pollard use before he inevitably hurt himself after the run? KE=1/2mv^2 *

The consumption of fossil fuels could be

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.

Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's