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A circular disk of mass 10.0 kg and radius 0.500 m rotates at 30.0 revolutions per second on a vertical axle, in the direction clockwise when viewed from above. Below it is a 30.0 kg disk of the same radius that is rotating 30.0 revolutions per second, but in the opposite (counterclockwise) direction. The upper disk is then allowed to drop onto the lower and, after friction forces have acted the two rotate together as a single disk of mass 40.0 kg.
(a) What is the final angular velocity of the combination of disks?
(b) What fraction of the initial kinetic energy of the system of two disks is lost in this interaction?
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Illustrate the cause of the components accelerating from rest down the conveyor.
The two most prominent wavelengths in the light emitted by a hydrogen discharge lamp are 656 nm (red) and 486 nm (blue). Light from a hydrogen lamp illuminates a diffraction grating with 460 lines/mm , and the light is observed on a screen 1.7 m b..
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In this week's experiment, we will accelerate electrons and inject them into magnetic fields generated by Helmholtz coils in the direction perpendicular to the magnetic fields, what is the final speed of the electrons
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A 90° inverted cone contains water as shown. The volume of the water in the cone is given by V = (p/3) h3. The original depth of the water is 10 cm. A block with a volume of 200 cm3 and a specific gravity of 0.6 is floated in the water. Find the c..
How long after being thrown will the balls collide
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An aquarium contains a 5-cm layer of water (n = 1.333) floating on top of carbon tetrachloride (n = 1.461). If an angle of incidence into water from the carbon tetrachloride is 20, what is the angle of refraction into the air.
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