Electric field lines . Select all that are true. A. Cannot cross each other B. Should be smooth curves C. Should always end on negative charges or at infinity D. Flow from high potential to low potential

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.