Answer:
1. W = F d = 20 N * 6 m = 120 J
2. F = W / d = 60 J / 2 m = 30 N
3. d = W / F = 350 J / 85 N = 4.12 m
4. P = W / t = F d / t = 45 N * 9 m / 10 s = 40.5 Watts
5. W = P t = 500 W * 120 sec = 60,000 J
6. t = W / P = 550 J / 310 W = 1.77 sec
A heat engine is a device that uses heat to produce useful work.
It should be 0.25kg because you converter from g to kg and since 1g<1kg so you move the decimal to the left
Tectonic plates and convection cells move tectonic plates