What is a source of energy that contains more energy per kilogram than coal or petroleum and provides about 25% of the energy consumed in the u. s.a.? a word or phrase

How do you tell if someone actually cares about you? and just say they do?

Choose all the answers that apply. our solar system: is in a spiral galaxy no longer includes pluto is made mostly of empty space is in the andromeda galaxy is the only known system that supports life

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?