How far can a person run in 15 minutes if they can run 2 miles per hour?

if a person can run 2 miles per hour which means 60 mins

60x=15×2

60×=30

×=30/60

×=0.5miles

so a person can run 0.5 miles in 15 minutes

which means 804.67 meters in 15 minutes

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.