What is the potential energy of a 2500 g object suspended 5 kg above the earth's surface? kilograms.

Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.

Which is a substance that can be separated by physical means and is not the same throughout

The electric field inside a cell membrane is 8.0mn/c. what's the force on a singly charged ion in this field?