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A beam of initially unpolarized light passes through a sequence of three ideal polarizer's. The angle between the axis of the first and second polarizer's is 18.1o, and the angle between the axis of the second and third polarizer's is 52.9o. Find the ratio of the intensity of light emerging from the third polarizer to the intensity of light incident on the first polarizer?
A professor's office door is 0.90m wide, 2.2m high, 4.2cm thick; has a mass of 28kg , and pivots on frictionless hinges. What is the moment of inertia of the door
A sample containing beryllium (atomic mass 9 u), aluminum (27 u), and an unknown element is placed in a mass spectrometer. Identify the element, using its chemical symbol
A spherical balloon is made from a material whose mass is 3.00 kg. The thickness of the material is negligible compared to the 1.6-m radius of the balloon. Find the absolute pressure of the helium gas
A sled slides down a hill 45 meters high with a slope of 25o. The total mass of the sled plus contents is 247 kg. find the velocity of the sled at the bottom
A pendulum hangs from an inclined wall. Suppose that this pendulum is released at an initial angle of 10 degrees and it bounces off the wall elastically when it reaches an angle of -5 degrees
A solenoid of n=100 turns per centimeterhas a current i running in it suchthat the resulting magnetic field is B=1T. Find the magnitude of the currenti.
The far point of a nearsighted person is 5.1 m from her eyes, and she wears contacts that enable her to see distant objects clearly. How high is the image formed by the contacts
An 93-g arrow is fired from a bow whose string exerts an average force of 120N on the arrow over a distance of 77cm, What is the speed of the arrow as it leaves the bow
An asteroid is discovered in a nearly circular orbit around the Sun, What is the asteroid\'s orbital period, its \"year,\" in terms of Earth years
A curling stone with a mass of 7.00 kg moves across the ice at a speed of 1.35 m/s in the positive x direction. What is the initial momentum
An electron of kinetic energy 1.44 keV circles in a planeperpendicular to a uniform magnetic field. The orbit radius is 22.7cm. Find (a) the electron's speed,(b) the magnetic field magnitude,(c) the circling frequency (in Hz), and(d) the period of th..
A highway curve of radius 560m is designed for traffic moving at a speed of 94.0km/hr. What is the correct banking angle of the road
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