The tolerance is -+1 in the 3rd significant digit.

A rocket, which is in deep space and initially at rest relative to an inertial reference frame, has a mass of 81.1 x 10' kg, of which 23.4 x 10' kg is fuel. The rocket engine is then fired for 400 s, during which fuel is consumed at the rate of 410 kg/s. The speed of the exhaust products relative to the rocket is 3.63 km/s. (a) What is the rocket's thrust? After the 400 s firing, what are (b) the mass and (c) the speed of the rocket? (a) Number i Units (b) Number i Units v (c) Number Units v