(A)at different times a proton and electron are placed equidistant from a point charge.how do the magnitudes and directions of the forces acting on them compare ?why?
(B)how do the accelerations and directions of travel of the electron and proton compare? why?
(C)why are gravitional more important than electrical forces when we calculate the orbits of planets ?why is the electrical force more important than the gravitional force when scientists study interactions at the atomic level?
(D)what explanation is used today to explain how electrical forces are ablr to act upon objects at a distance?
(E)newton’s theory explained electrical attraction at a distance .what kind of electrical phenomena at a distance did it fail to explain? how does the modern explanation .account for this second kind of action at a distance?
(F)a compass needle points towards magnetic north because the earth exerts a magnetic force on the compass.does the compass needle exert a force on earth ?if so,is this force larger,smaller or the same as the force that the earth exerts on the compass? explain why in terms of newton’s laws?
(G)the frequency of gamma radiation is 10 to the power of 22 Hz. if planks constant ,h, is equal to 6.6*10 (to the power of) -34 J.s, what is the energy of each gamma ray photon? show calculations?(a)the energy of each photon of visible light has about 6.6*10 (to the power of) -19 J of energy .which has a higher frequency ,visible light or gamma rays? give an explanation for your answer based on your knowledge of the relationship between energy and frequency? (b)which has longer wavelength ,gamma radiation or visible light ?(c) if a beam of visible light causes a piece of metal to eject electrons , do you think that a beam of gamma rays would cause the metal to eject electrons? why or why not?