Calculate the average velocity of a walker who walks north for 1.3 km then south for 2.8 km and completes the trip in 48 minutes. Write the answer in m/s.

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.

Petroleum contains energy. a. light b. kinetic c. chemical d. mechanical

The diagram shows a boulder rolling down a hill into a valley and then up the opposite hill. at which position does the boulder have the greatest kinetic energy? ab c d