Which set of elements represents a period within the Periodic Table? H, He, Ar , Xe , Rn ,

N, P, As, Sb , Bi

K, V, Fe, Ga , Kr

La, Pa, Sm, Tb, Yb

1.solid

2.carbon dioxide

3.helium

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

question answered by

(jacemorris04)