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The combination of an applied force and a frictional force produces a constant torque of 21 N · m on a wheel rotating about a fixed axis. The applied force acts for 5.9 s, during which time the angular speed of the wheel increases from 0 to 12 rad/s. The applied force is then removed, and the wheel comes to rest in 65 s. What is the frictional torque?
A 0.150 kg ball is going around in a vertical circle of radius R = 0.300 m at constant speed v. The ball is attached to a mass less ideal string which is attached to a fixed pivot point. If the tension F in the string is greater than 125 N, the st..
Red light of wavelength 633nm from a helium-neon laser passes through a slit 0.350mm wide. The diffraction pattern is observed on a screen 3m away.
If it takes 3 golf balls to equal the mass of one tennis ball, what weight of tennis balls do you require equalling the number of golf balls in one kilogram of golf balls.
A box is dropped from a spacecraft moving horizontally at 27.0 m/s at a distance of 155 m above the surface of a moon. The rate of freefall acceleration on this airless moon is 2.79 m/s2.
A circuit contains six 240 ohm lamps with 60 W bulbs and a 10 ohm heater connected in parallel. the voltage across the circuit is 120 V. If the circuit has a fuse rated at 12 A, would it melt if everything is on.
If light enters the window from outside at 23.0° to the normal, at what angle to normal does it exit the window on the inside.
Suppose a small boat is at the crest of this wave, 1.5 {rm m} above the equilibrium position. Illustrate what will the vertical position of the boat be 5 seconds later?
An iron tower in is 399 meters tall on a cold day (T = -6.7 degrees Celsius). What is its height of the tower on a hot day while the temperature is 31.5 degrees Celsius.
Two identical 10 g iron springs, except that one has been wound using work W, are dropped into equal volumes of 15M HC1 in two identical constant volume calorimeters, that are adiabatically insulated. The HC1 will dissolve iron springs. What differen..
Use approximate calculations assuming constant current during the output pulse. Calculate the ampere-hour rating of the battery so it lasts for five years.
Sam's speed at the bottom is 35.0. Illustrate what is the coefficient of kinetic friction of his skis on snow?
A stone is thrown vertically upward with a speed of 16.0 m/s. How fast is it moving when it reaches a height of 12 m? How long is required to reach this height?
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