If the speed of an object decreases to one-half, what happens to its momentum?
a. it decreases to one fourth.
b. it doubles.
c. it remains the same.
d. it decreases to one half.

Keneila is attempting to ski down a 20 m high friction free hill for the first time. she has a speed 10 m/s at the top. what is her kinetic energy when she is a the bottom, 20 m ? (a)2500 j (b)9800 j (c)12300 j (d)3100j (e)15000j

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

What is a view of science and psychology that says the value of knowledge depends on its usefulness? a. pragmatism b. psychotherapy c. physiology