If you want to change the charge of your atom, you can either(Check all that apply)

(A) add a proton
(B) add a neutron
(C) add an electron
(D) remove a proton

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec

The number of passengers who arrive at the platform of a subway station for the 10 am train is a random variable with a mean of 120 and a variance of 16. find the lower bound of the probability that there will be between 100 and 140 passengers (round off to second decimal place).

When using the scientist method, which step comes last?