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Someth1ng, I like your answers, exactly the same as mine :P 19 is definitely D, If you had low resistance all you would get in your pot is a bunch of eddy currents that produce little heat because they don't lose as much energy from resistance in the metal. This is why you use mostly iron based...

If you were standing on the electron (lol) you would see the world contract as it passes you at 3x10^7 m/s. From the electron's frame of reference you are observing the distance you are travelling. This is pretty cool. Say you had a 40 cm ruler (R1) travelling at 3x10^7 m/s that goes past...

I reckon Goldy/Automatia/lance/sylock(heythere) are correct. The mass from tower B would stay in orbit as it is released at geostationary orbit height at geostationary orbit velocity. And the one from A would just drop as it has no orbital velocity. I agree.

May as well throw these out there: 1. D 2. A 3. C 4. B - But fuuuu I dunno so just did final - initial 5. C 6. C 7. B 8. A 9. B 10. D 11. C - This I'm quite sure on, A would mean no net force on the rocket, B lolwut, D a rocket still works in a vacuum, launch pad doesn't matter 12. A 13. B...