A crane lifts a 100 kg concrete block to a vertical height of 25 m. Calculate the work done by the crane.

only answer if u know pls

The sun generates both mechanical and electromagnetic waves. which statement about those wave is true?

Eddy whose mass is 55kg climbs up the 1.50 meter high stairs in 2s.calculate eddy’s power rating

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.