What happens to a star after it becomes a supernova?

If you touch a hot light bulb and get burned, that is an example of a. radiation b. convection c. conduction

Amira pulls a 3 pound wagon 4 feet. how much work has she done?

Awater-filled u-tube manometer is used to measure the pressure inside a tank that contains air. the water level in the u-tube on the side that connects to the tank is 5 ft above the base of the tank. the water level in the other side of the u-tube (which is open to the atmosphere) is 2 ft above the base. determine the pressure within the tank.