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Unpolarized light with an intensity of 760 W / m2 is incident on a polarizer with an unknown axis. The light then passes through a second polarizer with has an axis which makes an angle of 83.5° with the vertical. After the light passes through the second polarizer, its intensity has dropped to 137 W / m2. What is the angle between the axes of the polarizers?
Hot water at 90 degrees C is poured into a large Styrofoam cup that contains water at 20 degrees C. calculate the ratio of cold water to hot that would give this result. Start with energy conservation: Q(H) + Q(C) = 0
Five-gram samples of copper and aluminum are at room temperature
Calculate the force on a 1 meter long length of wire carrying a 5 amp current in a magnetic field of .75 teslas that act perpendicular to the wire. determine the change in the acting force on the wire
What is the kinetic energy of a carbon atom moving with a speed of 500 m/s.
A car of mass 1.8 x10^3 kg is travelling east at a speed of 28m/s along a horizontal roadway. When its brakes are applied, the car stops in 5.8s. What is the average horizontal force exerted on the car even as it is braking.
Determine how many times greater heat loss occurs through a glass window thats 80.0 cm high, 70 cm wide, and 0.300 cm thick (k = 0.791 W/m°C) than a electrical supply line running outside to an exterior mounted light.
A quasar 10 billion light years from Earth appears the same brightness as a star 5.9*10^4 light years away. How does the power ouput of the quasar compare with that of the star
if a force of 500n is needed to stretch a spring 2 cm, what force is needed to stretch 5cm
A lead ball is dropped into a lake from the diving board 30 m above the water. After entering the water, it sinks to the bottom with the constant velocity equal to velocity with which it hit the water. The ball reaches the bottom 10 s after it is ..
A 440.0-N force accelerates a go-cart and its driver from 10.1 m/s to 18.1 m/s in 5.20 s. What is the mass of the go-cart plus driver
5 moles of a monatomic gas has its pressure increased from 105 Pa to 1.5*105 Pa. calculate How much work is done by the gas
A flashlight on the bottom of a 4-m deep swimming pool sends a ray upward and at an angle so that the ray strikes the surface of the water 1.70-m from the point directly above the flashlight. What angle (in air) does the emerging ray make with wat..
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