The following are positioned in sequence: a source of beam of natural light intensity i0; three ideal polarizers a, b, c; and an observer. polarizer axis angles are measured clockwise from the vertical, from the perspective of the observer. the axis of polarizer a is set a zero degrees (vertical), and the axis angle of polarizer c is set at 50 degrees.

a) if polarizer b is set so the beam intesity is zero at the observer, what are the two possible axis angle settings of polarizer b?

b) if polarizer b is set so that the beam intensity at the observer is a maximum, what is the axis angle of the polarizer b? show detailed steps

c) if the axis angle of polarizer b is set to 120degrees, what is the ratio of the intensity of the beam at the observer to the intensity of the source?

In a wind tunnel the speed changes as the cross sectional area of the tunnel changes. if the speed in a 6' x 6' square test section is 100 mph, what was the speed upstream of the test section where the tunnel measured 20' x 20'? use conservation of mass and assume incompressible flow. conservation of mass requires that as the flow moves through a path or a duct the product of the density, velocity and cross sectional area must remain constant; i.e., that ova-constant. a model is being tested in a wind tunnel at a speed of 100 mph if the flow in the test section is at sea level standard conditions, what is the pressure at the model's stagnation point? (a) the tunnel speed is being measured by a pitot-static tube connected to a u- tube manometer. what is the reading on that manometer in inches of water? (b) at one point on the model a pressure of 2058 psf is measured. what is the local airspeed at that point?

Aphysical change is a change in the size, shape,, or stafe of matter true or false

Which graph represents motion with an object with positive velocity that is located at a position of 3 meters at a time of 0 seconds? a) a b) bb eliminate c) c d) d