Determine the instantaneous frequency in Hz of each of the following signals: (a) 10 cos200 /3 (b) 10 cos20 (c) 10 cos20 sin 2 (d) cos200 cos5 sin 2 sin200 sin5 sin 2 (e) 10 exp200 1 √

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.