In reaching her destination, a backpacker walks with an average velocity of 1.48 m/s, due west. This average velocity results, because she hikes for 6.07 km with an average velocity of 3.29 m/s due west, turns around, and hikes with an average velocity of 0.791 m/s due east. How far east did she walk (in kilometers)?

Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat