Ball 1, with a mass of 20kg is moving to the right at 20 m/s. at what velocity should ball 2, with a mass of 40kg, move so that they both come to a standstill upon collision?

Which type of microscope would allow the viewer to see ribosomes inside a cell?

A26 cm object is 18 cm in front of a plane mirror. a ray of light strikes the object and is reflected off the mirror at a 42-degree angle. what is the angle of reflection? degrees what type of image is formed? what is the size of the image? cm

While standing outdoors one evening, you are exposed to the following four types of electromagnetic radiation: yellow light from a sodium street lamp, radio waves from an am radio station, radio waves from an fm radio station, and microwaves from an antenna of a communications system. rank these type of waves in terms of increasing photon energy.