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Two polarizing sheets are placed together with their transmission axes crossed so that no light is transmitted. A third sheet is inserted among them with its transmission axis at an angle of 38.0° with respect to the axis of the first sheet. Discover the fraction of incident unpolarizedlight intensity transmitted by the three-sheet combination. (Suppose each polarizing sheet is ideal.)
Two converging lenses, each of focal length 15.1 cm, are placed 40.4 cm apart, and an object is placed 30.0 cm in front of the first lens. What is the magnification of the system
A person running a fever has a body temperature of 39.4 degrees C What is the person's temperature on the Fahrenheit scale
A parallel-plate capacitor has each plate with a surface area of 12.5cm^2, separated by a distance of 0.270mm. find The total electric field between the plates
A 20-kg child swings back and forth on a swing such that her height h in m from the ground as a function of x is described by: h(x) = 0.5 + 0.45x2 for -1.2 m ? x ? 1.2 m
A train is en route from Chicago to New York at 110km/h when the engineer spots a cow on the track. How far was the train from the cow when the engineer first applied the brakes
A chairlift has a length of 2 km, a vertical rise of 100 m, and it is operating at a constant speed of 8 km/h. The chairs are located 20 m apart, and each chair can seat four people (250 kg total mass). Determine the power required to operate this..
A boy in a moving bus at +6 m/s observes a car moving at -3 m/s. What is the actual velocity of the car
A lens for a 35-mm camera has a focal length given by f= 43mm. What is the magnification of the image on the film
A river that is 207 m wide flows due east at a uniform speed of 1.9 m/s. What is the magnitude of the boat's velocity
The radar system at an airport broadcasts 15 GHz with 150 kW. An approaching airplane with a 34 m^2 cross section is 24km away. Assume that the radar broadcasts uniformly in all directions and that the airplane scatters microwaves uniformly in all di..
A coil with length of 11 m and a cross section of 2.3 cm is connected in series with a 8.0 k? resistor. what is the energy density inside the coil
A flatbed truck with a box sitting on the bed accelerates from rest on level ground. The truck's speed as a function of time is 15t - 2t2 during this acceleration. What force does that work on the box
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