Which statement best explains the movement of electric current from the clouds to the ground during a lightning storm ?

An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false