NEED HELP A 787 Dreamliner was able to obtain a speed of 0.85 Mach (1041 kph) with a mass of 227 930 kilograms. What is the Dreamliner's momentum at that speed? Give the answer to all momentum questions in kg • m/s.

A6,600 kg train car moving at +2.0 m/s bumps into and locks together with one of mass 5,400kg moving at -3.0m/s. what is their final velocity? +0.50 m/s -1.0 m/s +2.5 m/s -0.25 m/s

How would doubling the made of an object change the objects potential energy

Oxygen undergoes an isentropic expansion from 120 degree c and 280 kpa absolute to 140 kpa absolute. determine the final temperature of the oxygen and the amount of work per kg of o_2 produced in the process if it is adiabatic.