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A soap film is illuminated by white light normal to itssurface. The index of refraction of the film is 1.50. Wavelengths of 480nm and 800nm and no wavelengths between are beingintensified in the reflected beam. What is the thickness of the film?
A 36 kg girl and a 7.9 kg sled are on the frictionless ice of a frozen lake, 20 m apart but connected by a rope of negligible mass. How far from the girl's initial position do they meet
A bullet of mass 10.5 g is fired into aninitially stationary block and comes to rest in the block. Theblock, of mass 0.80 kg, is subject to nohorizontal external forces during the collision with the bullet.After the collision, the block is observe..
Calculate the smallest coefficient of static friction necessary for mass A to remain stationary.
A 36g glass thermometer reads 20.6C before it is placed in 104mL of water. What is the original temperature of the water
A cannonball is shot (from ground level) with an initial horizontal velocity of 41.0 m/s and an initial vertical velocity of 21.0 m/s. How far from where it was shot will the cannonball land
A sample of ethyl alcohol (C2H5OH) has a density of 806 kg/m3 and a volume of 2.94 x 10-3 m3. find the number of molecules in the sample
A football quarterback is moving straight backward at a speed of 2.0 m/s when he throws a pass to a player 20.0 m straight downfield. How long does it take to get to the receiver
A contestant on "Survivor" is challenged to find buried treasure in a featureless desert. For how long should she run in order to retrieve the treasure
A pump is required to lift a mass of 770 kg of water per minute from a well of depth 14.2 m and eject it with a speed of 17.5 m/s. How much kinetic energy does the pump give the ejected water
A toy car is driven by a battery of 9V. it draws a current of 2mA. what is the resistance of the car
In recent years, a number of nearby stars have been found to possess planets. Find the mass of the star
A clock has a second hand whose tip rubs against the inside of the glass cover. what is the minimum torque that must be applied to the second hand
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