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 stepsc) 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?

What is the relationship between atmospheric pressure and the density of gas particles in an area of increasing pressure? (2 points) as air pressure in an area increases, the density of the gas particles in that area decreases. as air pressure in an area increases, the density of the gas particles in that area increases. as air pressure in an area increases, the density of the gas particles in that area remains constant. as air pressure in an area increases, the density of the gas particles in that area increases and decreases in an alternating pattern. 3. which of the following correctly describes a way in which earth's atmosphere interacts with the geosphere? (2 points) it contains gases that living organisms breathe. it contains gases that trap incoming solar radiation. it provides a medium for cycles that provide nutrients to living organisms. it provides a medium for water to move between earth's surface and the air. 4. which of the following is considered a drawback to using wind energy as a source of power? (2 points) wind energy is nonrenewable. wind energy produces large amounts of air pollution. wind turbines can kill birds that fly through the rotors. wind turbines are built too close to major population centers. 5. a meteorologist predicts that the weather in a region will soon change from clear skies to probable thunderstorms. prior to making this prediction, what did the meteorologist most likely observe on a barometer? (2 points) the barometer fell slightly. the barometer fell substantially. the barometer rose slightly. the barometer rose substantially. 6. which of the following do meteorologists not typically use weather balloons to record? (2 points) atmospheric pressure cloud types humidity temperature 7. during which step in the can crush lab did water vapor force air from the can? (2 points) the can was filled nearly to the top with water. the can was placed on the hot stove top burner for several minutes. the can was removed from the hot stove top burner. the can was placed upside-down in the water-filled pan.

When you turn on a battery-operated device, an electrical circuit is

What will a positive and a negative charge do if they are separated from each other?