Where would a car traveling on a roller coaster have the most potential energy at the bottom it’s always the same at the top halfway to the top

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 of hubble’s discovery support the big bang theory

Work requires a force which causes: potential energy or motion