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A bicycle wheel, of radius 0.34 meter and mass 3 kilogram (concentrated on the rim), is rotating at 4.11 rev/s. After 45 s the wheel comes to a stop because of friction. Find the magnitude of the average torque due to frictional forces?
When a parachute opens, the air exerts a large drag force on it.This upward force is initially greater than the weight of the skydiver and, thus, slows him down. Suppose the weight of the skydiver is 902 N and the drag force has amagnitude of 1030..
A man throws a ball such that it strikes a wall of a building at the max height of its trajectory. If it takes 1.15 seconds to travel from man to the building, determine the velocity at which it was thrown, the angle, and the height of the building.
The human eye can detect light intensities as small as about 8 10-23 W/m2. The corresponding electric field amplitud is 2.5E-10N/C, How does this force compare to the weight of an electron
Cyclotrons are sometimes used for carbon-dating by accelerating singly ionized C14 and C12 ions from a sample of material. find the difference in cyclotron frequencies for the two ions
assume you are carrying out the conversion of 1-bromobutane to 1-butane. how could you use infrared spectroscopy ir to
A metal bar is in the xy-plane with one end of the bar at the origin. What are the magnitude of the torque with respect to the origin produced by F
A wave is described by y = 0.020 9 sin(kx - ?t), where k = 2.05 rad/m, ? = 3.67 rad/s, x and y are in meters, and t is in seconds, Determine the amplitude, wavelength, frequency and of the wave
A dynamite blast at a quarry launches a rock straight upward, and 2.4 second later it is raising at a rate of 12 m/s. evaluate its speed at launch
An ocean liner leaves New York City and travels 12.0° north of east for 111 km. How far east and how far north has it gone? In other words, what are magnitudes of the components of the ship's displacement vector in the directions.
Two grams of 100 degree C steam are injected into a wellsealed styrofoam container that holds a mixture of 24 grams of iceand 50 grams of liquid water, both at 0 degree C. How much of the ice melts and what is the equilibrium temperature of the mix..
The distance among the eyepiece and the objective lens in a certain compound microscope is 29.2 cm. The focal length of the objective is 0.520 cm, and that of the eyepiece is 1.90 cm. Discover the overall magnification of the microscope.
A circular armature coil is used in a motor with a uniform magnetic field of 2.65 T, If this motor is operating on 120 VRMS now with a load (e.g running a fan) and at the angular frequency ?A, how much current is flowing throught the motor
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