Given the speeds of each runner below, determine who runs the fastest.

emily runs 15 feet per second.
jake runs 109 feet in 8 seconds.
stephanie runs 1 mile in 467 seconds.
tony runs 760 feet in 1 minute.

a. emily
b. jake
c. stephanie
d. tony

option A

Explanation:

we will converts all the velocity into SI unit then we can tell who is running fast.

a) Emily runs at 15 ft/s

1 ft/s = 0.3048 m/s

15 ft/s = 4.572 m/s

b) Jack runs at 109 ft in 8 s

1 ft = 0.3048 m

109 ft = 33.22 m

speed = 33.22/8 = 4.152 m/s

c) Stephanie runs 1 mile in 467 seconds

   1 mile = 1609.34 m

  speed = 1609.34/467

      v = 3.45 m/s

d) Tony runs 760 feet in 1 minute.

1 ft = 0.3048 m

760 ft = 231.65 m

speed = 231.65/60 = 3.86 m/s

from the above solution Emily runs fastest.

the correct answer is option A

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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