Explain using an input and output voltage sketches how a vco (ic 566) can be used to generate an fm (frequency modulation) signal and how a pll (phase locked loop) can be used to demodulate the fm signal. why is fm signal better than am (amplitude modulation) signal?

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.