The Franck-Hertz experiment accelerated electrons in a mercury vapor tube and measured the current at the collector, demonstrating: a. the line spectra of mercury, consistent with the Bohr model.
b. the discrete energy levels of the atom, consistent with the Bohr model.
c. elastic and inelastic collisions of electrons with mercury atoms.
d. all of the above.

a charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a third charge so it would experience no net electric force? enter an expression for the exact answer, which will involve a square-root sign. (do not enter an approximate decimal answer.)

answer:   you might love summer weather, but you don’t want it to feel like the sun is inside your car. but a hot car that just won’t seem to cool down might be a bigger of a problem than you think. your car relies on being at the right temperature.

explanation:

im srry but ur wrong the answer is d a smooth rock, some red dirt, and an empty bird's nest.