1. An object with a mass of 2.0 kg accelerates 20 m/s2 when an unknown force is applied to it. What is the amount of the force?

How do you tell if someone actually cares about you? and just say they do?

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?

Aphoton is absorbed by an electron that is in the n = 3 state of a hydrogen atom, causing the hydrogen atom to become ionized. very far away from the nucleus, the released electron has a velocity of 750,000 m/s. what was the wavelength of the absorbed photon?