A student runs 100 meters in 16 seconds. What is the speed of the student?

6.25m/s

Explanation:

speed = distance/time

speed = 100/16 = 6.25m/s

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation:

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a