Which of the following is an example of increasing friction intentionally? a. waxing skis b. adding grease to gears on a bike c. throwing sand on an icy driveway d. oiling a squeaky door select the best answer from the choices provided

Agas contained within a piston-cylinder assembly undergoes three processes in series: process 12: compression with pv= constant from 1 bar and 1 liter to 4 bar. process 23: constant pressure expansion to 1 liter. process 31: constant volume calculate the pressure and volume at each state, and sketch the processes on a p-vdiagram labeled with pressure and volume values at each numbered stat

Properties seen when one one substance changes to another are known as properties

On mars a rock falls an unknown vertical distance from a resting position and lands in a crater. if it takes the rock 2.5 seconds to fall, how high is the cliff the rock fell from? mars' surface gravity is 3.8 m/s2.