A spring with a spring constant of 100 n/m is stretched o.5m in length. How much potential energy is stored in the spring?

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Salt in oceans comes from and of rocks

Use the periodic table to classify each of the elements below. cadmium (cd): vanadium (v): xenon (xe): iodine (i): potassium (k): strontium (sr):