Mechanical wrist watch has which type of energy
Electrical or elastic potential

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

Which accurately compares concave and convex lenses?

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?