Question 7 Chris and Dave raced up a 25 m hill. Chris took 40 seconds to reach the top and Dave took 45 seconds. Both men have the same weight. Which of the following is true?
Chase did more work than Dave
O Dave did more work than Chris
Chris produced more power than Dave
Dave produced more power than Chris

Several mountains together form a mountain . a few of these combined form a mountain system. several systems combined form a mountain , which can stretch thousands of miles in length.

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.

In the first law of thermodynamics, triangle e=q-w, what does q stand for