Afootball player runs down a field with a speed of 8 m/s. how long will it take him to run 20m?

Time taken, t = 2.5 seconds

Explanation:

It is given that,

Speed of the football player, v = 8 m/s

We have to find time taken by the football player to run 20 m. It can be calculated suing the formula of speed of the player i.e.

d = distance

t = time taken

t = 2.5 seconds

Hence, time taken by the football player is 2.5 seconds

c. rb

explanation:

the atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding shells of electrons.

radiation

explanation:

heat is transmitted by radiation