How much spring potential energy is stored when a railroad car spring, k = 3,333 N/m, is compressed 0.20 meters?

What should the power status of a circuit be when measuring resistance with an ohmmeter?

What is created when solids,liquids,an gases mix with one another

Using a wheel and axle, a farmer is trying to lift a bucket of water from the bottom of a well. the larger wheel has a radius of 40 cm compared to the axle that has a radius of 10 cm. if a bucket of water is 50 n, then how much effort is required to raise it? 12.5 n 200 n 2 n 500 n