An ultraviolet photon ( 58 4 nm) from a helium gas value of the quantum number of the energy level for which the discharge tube is absorbed by a hydrogen molecule that is at energy is equal to at 25 C ( ) for a box 1 nm long, ( ) for rest. Since momentum is conserved, what is the velocity of the a box 10 m long, and ( ) for a box 10 m long. hydrogen molecule after absorbing the photon

What happens to light waves from a star as the star moves away from earth?

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve

Apulley with mass mp and a radius rp is attached to the ceiling, in a gravity field of 9.81 m/s2 and rotates with no friction about its pivot.