A heat engine has a thermal efficiency of 0.46. During each cycle, it absorbs 780 J of heat from a high-temperature reservoir. How much waste heat does it discard each cycle. A) 420 J
B) 200J
C) 780 J
D) 360 J

When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great.d) about 10 times as great.

You can decrease the resistance of a length of wire by

Which is an example of an exothermic process?