~ Need PHYSICS/HOMEWORK HELP! ~ (PLEASE!)

[closterj]

I have a few physics questions and they have got me stuffed. if someone could help and justify there answer thanks

1) A spaceship travels with a speed of 0.7c as it passes the earth on its way to a distant star. The pilot of the spaceship measures the length of the moving ship as 30m

Determine its length as measured by a person on earth. Answer units in m.

2) (Extension of question 1) - The pilot of the spaceship observes that the spaceship travels for 9 years.

Determine how much time has passed according to a person on earth. Answer in units of years

3) (extension of question 1 & 2) Some time after the passing of earth, the pilot shoots a laser pulse backwards at a speed of 3*10^8 m/s (3 times 10 to the power of 8 meters per second) with respect to the spaceship.

Determine the speed of the laser pulse as measured by a person on earth. Answer in units m/s





Thanks Very Much

 

[The Fat Controller]

Answered the first question on the other thread already, you don't need to post this up everywhere.

 

[closterj]

Thanks, its just i noticed that physics is usually on this page so i posted here als. its due tonight and i need help!

 

[Sythe]

This guy sent me pages of physics questions...

Christ, do your own homework. Stop trying to outsource it for free.

If you can't handle the homework then drop the course. You were clearly not meant to do physics.