Problem three: unpolarized light with intensity of 1350 w/m2, which is the intensity at an earth-orbit space telescope monitoring the sun, passes through four polarizers. the first has an angle of 30 degrees, the second with 35 degrees, third with 70 degrees, and fourth with 90 degrees, all angles with respect to vertical. a. what is the resulting intensity? b. what are two (of several, so pick two) changes you can make to ensure no light will pass through?

In which situation has the independent variable for the experiment been changed? check all that apply. changed from counting the number of duckweed at day 0 and day 14 to counting them every day changed from testing duckweed growth in beakers to testing duckweed growth in large outdoor tanks changed from testing the effect of ph on duckweed growth to testing the effect of light levels on duckweed growth changed from testing the effect of acid ph on duckweed growth to testing the effect of basic ph on duckweed growth

22. the effect of threshold braking is to a cause skids. b. lock wheels. c. prevent locking of wheels. d. increase stopping distance.

In an experiment, how can i change human errors? be specific.