Why did people think that Pluto was a planet in the decades after its discovery

Which graph best represents the relationship between the electric current and the rate at which a magnet is turning inside an electric generator?

Describe the function of the endomembrane system? what organelles are involved?

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.