Starting at -7m a person walks in the negative direction for 8m then turns around and walks 20m in the position direction. Where is his final position? What was his overall displacement? How much distance did he travel?

Ascientist is tracking an object orbiting the sun that is found between mars and jupiter. in order to classify the object as an asteroid, it must be at least

What properties of a moving object are used in determining the object's energy of motion

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?