Asteroid at 0.9c colliding with Earth in 2 hours

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rainbow90
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in Earth's reference frame:
1) what is the space time coordinate when time = 0
2)when the asteriod will collide wth the earth?

asteriod speed = 0.9c
asteriod colliding with eath in 2 hrs time

b)The mice population in asteriod. In mice reference frame, determine how much time they are able to live before Asteriod collides with Earth?

C)Asteriod mass is 10*8kg is smashing onto earth, How much energy it will released?

d)If Earth has 10*22kJ of nuclear ordinance, can Earth evade this castrophoy?

e)In asteriod reference frame.
a) find the space time coordinate when t=0
b) asteriod collision with earth

thanks mate for attempting this question... appreciated guys :)
 

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welcome to pf!

hi rainbow90! welcome to pf! :wink:

Show us what you've tried, and where you're stuck, and then we'll know how to help! :smile:
 
i do know i have to use
time dilation
length contraction
lorentz tranformation
time space coordinate

and also e=mc^2

but i not sure how to apply to this question

your help will be aprreciated :)
 
sorry, but on this forum you have to try the problems yourself first …

start with the poor ol' mice :redface: …

show us what you've tried, and where you're stuck, and then we'll know how to help! :smile: