The speed of the Moon is about 3000 m/s. It is really far away so it doesn’t look like it moves that fast. It has a mass of 7.35 x 10^22 kg and is about 384,390,100 m from the Earth. How much centripetal force is required to make the moon orbit around the Earth?

Light traveling in a medium with a refractive index 1.19 is incident on a plate of another medium with index of refraction 1.79. at what angle of incidence is the reflected light fully polarized?

The softest and hardest minerals are: softest hardest

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).