Show that the units of kinetic energy (from 1/2mv^2) and of gravitational potential energy (from mgh) are the same.

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.

An animal cell loses the ability to convert energy stored in food to energy that the cell can use. which of the cell's organelles has stopped working? a.the mitochondria b.the nucleus c.the vacuoles d.the endoplasmic reticulum

Salt in oceans comes from and of rocks