You end up pulling your little brother to the top of the hill. Determine the angle of the incline if the coefficient of friction is still 0.34 and your brother reaches a speed of 23m/s from rest over a distance of 30m

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.