1. An observer in stationary frame O observes an event in a moving frame O' at 0.9c, where c is the speed of light.
a) An event lasts 1 s in O'. How long is it perceived to take in O?
b) An object is 1 m long in O'. How long is it perceived in O?
2. Two rockets are approaching each other at 0.9c according to an observer in a stationary frame. According to an observer in Rocket 1, how fast is Rocket 2 approaching?
3. The molar mass of He is 2g/mole. What is the rest energy of a He atom?
Any help is appreciated, physics is not my forte. Thank you :) :)
have sexual intercourse with females, inherit some sort of profit. -Big_Spence
being a girl is nice for masturbation purposes...and you get to play with your own tittehz...but you do have to squeeze 6-8 pound living creatures out of your vagina...you got that to look forward to. -Gator.
and what the wise man said before: "if everyone skied, there would be no war." - p-fo.