Jane starts from her house to take a stroll in her neighborhood. after walking for 2 hours at a steady pace, she has walked 4 miles and is 2 miles from home. for this time, what was her speed?
a. 4 mph
b. 3 mph
c. 2 mph
d. 1mph

C. 2mph

Explanation:

Speed is the rate of change in distance. Since distance has to do with how far an object has gone, it means we will only take consideration of how far she has walked which is 4miles.

Mathematically, Speed = Distance/time

Given distance = 4miles and time = 2hours

Speed = 4miles/2hours

= 2miles/hour i.e 2mph

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.