The light bulb was an innovation of

a. guglielmo marconi

b. thomas edison

c. alexander graham bell

d. jean lenoir

e. gustav eiffe

Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?

Consider a hydrogen atom in the ground state. what is the energy of its electron? =e= jj now consider an excited‑state hydrogen atom. what is the energy of the electron in the =5n=5 level? =e5= j

Why do astronauts in the space shuttle weigh less?