Why do you suppose the rings of saturn are made of bright particles, whereas the particles in the rings of uranus and neptune are black?

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

The experiment done in lab is repeated, using a ball that has unknown mass m. you plot your data in the form of f 2 versus m/l, with f in rev/s, m in kg, and l in m. your data falls close to a straight line that has slope 3.19 m/(kg · s2). use g = 9.80 m/s2 and calculate the mass m of the ball.

Select all the correct answers. which three statements about electromagnetic radiation are true?