An atomic nucleus is composed of a) protons. b) protons and neutrons. c) protons and electrons. eliminate d) protons, neutrons, and electrons.

In order to place a satellite into orbit, it requires enough fuel to supply the necessary mechanical energy. into what types of mechanical energy does the fuel get transformed?

Which statement is true? a. kepler's laws apply only to the motion of earth. b. kepler's laws can be used to predict eclipses. c. kepler's laws are true for a central force that is directly proportional to distance. d. kepler's laws can be deduced from newton's laws of motion and gravity.

Ais a machine that makes work easier when a single force is applied. a simple machine b compound machine c endangered machine d complex machine