How much work do you do when you lift a 100-N child 0.5m?

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

Which boundary is associated with the building of the himalaya mountains? convergent transform divergent hot spot

What is the temperature in degrees celsius of a substance with a tempature of 49k