Consider the following statements and decide which of the listed scientists was responsible for each. You will use each scientist's name only ones. Dalton Thomson Rutherford Bohr

a. Believed that atoms were small indivisible particles
b. Developed the model of the atom that we still use today
c. Shot positively charged particles at gold foil, leading to discovery of the nucleus.
d. believed that the atom was a positive clump with negative charges embedded throughout, like a "chocolate chip cookie model"

One kind of e-book display consists of millions of very small spheres that float in a thin fluid layer between two conducting transparent plates. each sphere is black on one side and white on the other, and possesses an electric dipole moment directed from the white side to the black. when an electric field is applied between the plates, the spheres rotate so that their dipole moment lines up with the field. depending on the fields direction, either the black or the white sides of th espheres can be made visible.the dipole moment of the spheres can be modeled as two opposite charges of magnitude 3.5 x 10^-15 c, separated by a distancce of 100 micrometers (um). what is the maximum possible torque on a sphere if the electric field between the transparent plates is 4.0 x 10^5 n/c