As part of a physics experiment, you stand on a bathroom scale in an elevator . Though your normal weight is 590 Nthe scale at the moment reads 800 N. Calculate the magnitude of the elevators acceleration.

Given the position vector of the particle r(t)=(t+1)i+(t^2−1)j+2t k, find the particle's velocity and acceleration vectors at t=1

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.

Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost