A stone of mass 1kg is thrown at 10m/s upward making an angle of 37° with the horizontal from a building that is 20m high . Using the law of conservation of energy ,calculate the speed when the stone hits the ground

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.

Write a hypothesis about the effect of increasing resistance on the current in the circuit. use theformat and be sure to answer the lesson question. “how do changes in voltage or resistance affect current in an electric circuit? ”

If you let go of the notebook after lifting it, will it move? how?