Which of the following is the best example of an object being absorbing light

What is the momentum of a 2 kg object moving at 15 meters per second

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value

An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?