Lots of points how much time would it take a crane to unload a railroad car of scrap metal if: 1. the total load of scrap metal weighs 50,000 n 2. the crane must carry the load a distance of 20 meters. 3. the power of the crane is 2,000 watts. 4. the crane can carry 3,000 n of metal at a time. 5. it takes 30 seconds for the crane to pick up the load, carry it 20 meters, drop it and return to the railroad car. solve and give an explanation.

What is the relationship between the wavelength of a wave and it's energy?

In order to place a satellite into orbit, it requires enough fuel to supply the necessary mechanical energy. into what types of mechanical energy does the fuel get transformed?

Four objects each with charge +2.0×10−7c are located at the corners of a square whose sides are 2.0 m long. part a what quantities can be determined using this information? check all that apply. the electric force on a charged object placed at the center of the square. the mass of each object. the total electric potential energy of the system consisting of the four charged objects. part b find the electric force on a charged object placed at the center of the square.