Would this be reflection or refraction?

Which material produces static charge when rubbed?

The cerebellum controls? thirst sensations sleep-wake cycles hand-eye coordination heart rate and pulse

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.