Ch 4 Review

Remember your sig figs ... if your answer doesn't agree w/ mine, check that first.
1. 510 W
2. 5 m
3. Work = Fd, energy=ability to do work, measured in Joules, power = work/time = J/s = watt
4. 110 kJ
5. 110 kJ
6. 8.4 J
7. 800 J
8. 6.7 x 10^11 J
9. a) 1.58x10^17 J
b) same
10. a, b, and c are 5 J
d and e are 2.5 J
f) 4.5x10^16J
11. as velocity increases, time slows down because the speed of light is constant
12. see Einstein's big idea website
13. mass becomes infinite, energy required to move the mass also becomes infinite
14. gravity = distortion in spacetime
15 and 16 - see textbook.