exam question

[shezill]

i need help on this previous year exam question

consider a nucleus with a diameter 4 X 10^-14m. calculate its longest and shortest diameters when its moving at speed v = 0.99c.

thank you for any help

[stuffy]

It's a really simple problem, you just need the length contraction equation and then plug and chug.

d = d'(1-(v/c)^2)^1/2

Remember, this only affects the diameter in the direction of motion.