What healthy snack can provide protein after physical activity?

What do you think car designers do if the damage caused by a crash test is too severe?

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.

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.