Modern vacuum pumps make it easy to attain pressures of the order of 10⁻¹³ atm in the laboratory. a) at a pressure of 8.65×10⁻¹⁴ atm and an ordinary temperature of 296.0 k , how many molecules are present in a volume of 1.07 cm³? n= ? moleculesb) how many molecules would be present at the same temperature but at 1.06 atm instead? n=? molecules

Which statements about tornadoes are true? check all that apply. (a) about 12,000 tornadoes hit the united states every year. (b) a tornado looks like a funnel. (c) tornadoes are deadly atmospheric storms that cause millions in damages each year. (d) tornadoes can reach wind speeds of more than 300 miles per hour. (e) kansas is the state with the most tornadoes. (f) you will always notice a funnel before a tornado strikes.

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?

In science and physics what is the standard unit of measure for speed?