(a) Assuming the dimensions of the nucleus and atom shown in Figure 2.11, what fraction of the volume of the atom is taken up by the nucleus? (b) Using the mass of the proton from Table 2.1 and assuming its diameter is 1.0 X 10-15 m, calculate the density of a proton in g/cm3.
Physics Electricity and Magnetism (Professor Perdekamp) : Week 1 Notes Prelecture: Coulomb’s Law Electric Charge Gravity Electric Charge What is charge Electric charge is responsible for electric forces. Two kinds of electric charge: positive and negative Two kinds of electric force: attractive and repulsive Note: this is in contrast to gravitational force where mass only attracts Building Blocks of Matter Conductors: Insulators: Electrons free to move Electrons don’t/cannot move (metals) (plastics) Coulomb’s Law (1785) ex) r^ determines direction F1,2nd F 2,1Newton’s 3rd Law pairs! If the resultant number is: positive → force is repulsive negative → force is attractive Uni