Ahydrogen atom has a diameter of about 10nm

Erosion of the beach is normally a slow process. however, in certain situations, large chunks of shore may wash out to sea. what could cause this to happen?

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).

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?