Which describes increasing the efficiency of an energy resource? A>Making cars that get better gas mileage

B>Using biomass instead of coal

C>Turning off the lights when leaving a room

D>Switching from coal to solar

The earth remains in orbit around the sun due to the force of gravity. how does the force of gravity exerted by the sun on the earth compare to the force of gravity exerted by the earth on the sun?

Athermometer is removed from a room where the temperature is 70° f and is taken outside, where the air temperature is 10° f. after one-half minute the thermometer reads 60° f. what is the reading of the thermometer at t = 1 min? (round your answer to two decimal places.) ° f how long will it take for the thermometer to reach 30° f? (round your answer to two decimal places.)

Around faucet handle is part of a(n) a. lever b. screw c. inclined plane d. wheel and axle