Combining two parts that rotate, one of them larger than the other. This statement best describes a what type of simple machine? A pulley, wedge, screw or wheel axle

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

Avolleyball player hit a ball with a mass of 0.25 kg. the average acceleration of the ball is 15.5 m/s². how much force did the volleyball player apply to the ball? 62.0 n 3.87 n 62.0 m/s² 3.87 m/s²

Which activity is an innate behavior