An early model of the atom, proposed by Rutherford after his discovery of the atomic nucleus, had a positive point charge +Ze (the nucleus) at the center of a sphere of radius R with uniformly distributed negative charge -Ze. Z is the atomic number, the number of protons in the nucleus and the number of electrons in the negative sphere. a. Show that the electric field strength inside this atom is Ein = Ze 4pP0 1 1 r2 - r R3 2 b. What is E at the surface of the atom? Is this the expected value? Explain. c. A uranium atom has Z = 92 and R = 0.10 nm. What is the electric field strength at r = 1 2 R?
Motion simply is the change of a physical body’s position with time. There are 4 fundamental types of motion which are: Linear motionExample, A skateboarder moving along a straight line. Circular motionThis involves motion along a circular trail. Example, walking round a circular fountain. Projectile motionIt involves launching an object in air and the then it coming back down due to the law gravity. It always forms a curved path. Example, shotput, javelin or shooting an arrow in the air Rotational motion: it involves motion of a stiff body rotating about its axis. Example, a ball spinning on the ground about its axis. The first three motion listed above are all called translational motion. This is because they mov