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 electrons in the negative sphere.
a) Estimate the charged enclosed within a sphere with the nucleus at its center, and the radius of r, smaller than R.
b) Use Gauss' law to obtain the electric field inside this atom.
c) A uranium atom has Z = 92 and R = 0.10 nm. Estimate the electrostatic force that an electron would experience at r = R/2?

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.

in order to follow the instructions and complete the statements, i need to use data from table c of your student guide. can you think of a way to let me see your student guide for a while ? i can't answer the question without the data in table c.

hot magma rises and pushes up toward the lithosphere, and as it cools it cycles back down toward the core to be heated again.