a motorboat is headed out of velocity of 25 km/h towards the north while the velocity of the water current is 12 km an hour to the west What is the magnitude of the boat to resulte velocity

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.

What are the north and south poles of a solenoid change with?

Which of these is the best way to manage a natural resource