A 10.-kilogram rubber block is pulled horizontally at constant velocity across a sheet of ice. Calculate the
magnitude of the force of friction acting on the block.
[Show all work, including the equation and
substitution with units.]
30.

Which statement correctly describes the relationship between frequency and wavelength?

Light traveling in a medium with a refractive index 1.19 is incident on a plate of another medium with index of refraction 1.79. at what angle of incidence is the reflected light fully polarized?

Along the line connecting the two charges, at what distance from the charge q1 is the total electric field from the two charges zero? express your answer in terms of some or all of the variables s, q1, q2 and k =14ï€ïµ0. if your answer is difficult to enter, consider simplifying it, as it can be made relatively simple with some work.