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A beam of light passes through a polarizer and then an analyzer. In this process, the intensity of the light transmitted is reduced to 10% of the intensity incident on the analyzer. What is the angle between the axes of the polarizer and the analyzer?
An elastic cord is 63.9 cm long when a weight of 71.1 N hangs from it but is 88.9 cm long when a weight of 184 N hangs from it. What is the "spring" constant k of this elastic cord
When one gallon of gasoline is burned in a car engine, 1.18 x 10^8 J of internal energy is released. Suppose that 0.99 x 10^8 J of this energy flows directly into the surroundings (engine block and exhaust system) in the form of heat. If 6.0 x 10^5 J..
A 10 kg mass is hung from a pulley that is shaped like a hoop. What is the acceleration of the 10 kg mass as it falls
The electric field inside a 50.0?cm? long copper wire is 5.00mV/m .What is the potential difference between the ends of the wire
In a house the temperature at the surface of a window is 23°C. The temperature outside at the window surface is 4°C. What is the temperature at the outside window surface
A ball is thrown upward from the ground with an initial speed of 15.2 m/s; at the same instant, After how long will the balls be at the same height
0.015mol of a diatomic gas, with initial temperature 18 degrees C , How much heat is added during this process
A person is pushing a wheelbarrow along a ramp that makes an angle of 34 degrees with the horizontal. What is the total force the person must apply
A supertrain of proper length 200 m travels at a speed of 0.9 times the speed of light (relative to the tunnel) as it passes through a tunnel having proper length 80 m. how much longer is the train than the tunnel
As a spacecraft approaches a planet, the rocket engines on it are fired (turned on) to slow it down so it will go into orbit around the planet. compute how long (in minutes) must the engines be fired
A uniform board is leaning against a smooth vertical wall. The board is at an angle above the horizontal ground. The coefficient of static friction between the ground and the lower end of the board is 0.620.
The transformer in the power supply for a computer's 500-GB external hard drive changes a 120-V input voltage, what is the current in the primary and secondary when the drive is in operation
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