A 20-N falling apple encounters a 4-N of air resistance. The magnitude of the net force on the apple is? A. 0n
B.4n
C.16n
D. 20n
E. None of the above

What color would an object that reflects green and blue light appear to be in white light? a. blue b. cyan c. magenta d. black

An equinox occurs when a. neither end of earth's axis is tilted toward or away from the sun. b. the north end of earth's axis is tilted away from the sun. c. the north end of earth's axis is tilted toward the sun. d. earth's axis is parallel to the sun's rays. select the best answer from the choices provided a b c d

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid