How do scientists study pollen grains to help them understand climate change? by analyzing and making inferences about them
by observing and listing facts about them
by studying and reading more about them
by writing hypothesis about them

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

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?

For which pair of objects would adding the same a