How much oxygen is contained in the atmosphere?
a. 20%
b. 21%
c. 22%
d. 23%
user:
clouds are made up of tiny droplets. what happens to the droplets when they are very heavy?
a. they create another cloud
b. they begin to evaporate
c. they stay in the cloud
d. they fall to earth as rain, precipitation

Energy is the ability to do work which measures what

You notice a very one-dimensional-thinking snail crawling along one rail of a railroad track. naturally, you remove it to a safer place. but before you do, you observe it as it moves from position xi = -92.9 cm to position xf = -64.9 cm along the rail, as measured from a point where one rail abuts the next. what is the snail\'s displacement δx in centimeters?

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