Grass obtains 10% of the energy of the sun. when a mouse eats the grass, it gets only of the sun's energy while is lost as heat. 0.1%; 0.9% 1%; 0.9% 0.01%; 0.009%

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

Jessie ran 5000 meters from the cops and an average speed of 6 meters / second before he got caught . how long did he run?

An equinox occurs when a. neither end of earth's axis is tilted toward or away from the sun. b. the north end of earth's axis is tilted away from the sun. c. the north end of earth's axis is tilted toward the sun. d. earth's axis is parallel to the sun's rays. select the best answer from the choices provided a b c d