How many marbles would fit in beta Centauri?

Iflow from a warmer object to a cooler object until both objects are the same temperature what am i?

What is the internal energy of 4.00 mol of diatomic nitrogen gas n2 at 455k

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