7. find the direction and magnitude of the vectors
a. x=(5.0 m) î + (-2.0 m) î
b. b=(-2.0 m) î + (5.0 m) ſ and
c. åt b
8. find the direction and magnitude of the vectors
a. a = (25 m) î + (-12.0 m) ſ

F500 j of energy were added to 1 kg of each of these samples, which would experience the least temperature increase?

Power can be defined as a. the distance over which work was done. b. how much work can be done in a given time. c. all the work in an given area. d. the energy required to do work.

Two polarizers are oriented at 40∘ to each other and plane-polarized light is incident on them. if only 16 percent of the light gets through both of them, what was the initial polarization direction of the incident light?