Can you use a ruler with mm on it to measure something in cm

A17,250 kg rocket is pushed with a thrust of 6,450,284 n. what is the acceleration of the rocket?

Acoil suspended freely, points in some direction when no current is passed through it . can you tell what will happen when a current is passed though it?

A15,000 kg rocket traveling at +230 m/s turns on its engines. over a 6.0 s period it burns 1,000 kg of fuel. an observer on the ground measures the velocity of the expelled gases to be −1,200 m/s.