1. A spaceship is heading directly toward Earth at a velocity v of 0.720c. The astronaut on board claims that he can send a canister toward the Earth at u = 1.30c relative to Earth. Calculate the presumed correct velocity u' the canister must have relative to the spaceship Use u = (u' + v)/(1 +vu'/c^2) and solve for u'.

   A) 7.52 c

   B) 10.0 c

   C) 8.40 c

   D) 9.06 c