Exercise #3 Charles' Law Pressure sensor A piston with diameter 1cm and a frictionless plunger is filled with a diatomic ideal gas. The piston is connected to a gas reservoir (\"copper ball"), which is immersed in water, which in turn may be heated. Temperature sensor copper ball 1. On the diagram, use arrows to indicate all the forces acting on the plunger. 2. Assuming the piston has a diameter of 1 cm, estimate the external force acting on the piston. 3. As we increase the temperature of the gas in the copper ball from T1 to T2. the piston moves outward, but very slowly. What can you conclude about the pressure of the gas inside the piston (and hence, inside the ball)? 4. Make qualitative sketches of P vs. V and P vs. T and V vs. T for this process. V p- DEI El V T T