Cheryl runs a race on a circular 400.0 m track. She starts running east at the starting line and stops 50.0 m west of the starting line. Her time is 40 s. What is her average
speed?

2000 m/s
8.8 m/s
10 m/s
5.0 m/s

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.

0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr