The pressure in a closed container of gas is caused by the _ between
the particles of the gas and the walls of the container.

If the speed of a particle triples ,by what factor does its kinetic energy increase?

Anika asks eva to roll a basketball and then a bowling ball to her. which requires more force to roll, and why?

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?