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A spinning flywheel has rotational inertia I = 403.9 kg · m2. Its angular velocity decreases from 20.2 rad/s to zero in 257.2 s due to friction. What is the frictional torque acting?
The athlete shown in the figure rotates a 1.00 kg discus along a circular path of radius 1.05 m. Determine the magnitude of the maximum radial acceleration of the discus
How fast would javelin (normally 2.5 m long) have to be going (relative to an observer) to appear 20% shorter? (2 m long)
a small ball bearing is illuminated with blue light from an argon ion laser (4880 A.) What is the diameter of the ball bearing
Consider a 4.7mm-diameter wire made from copper (mass density of 8.9 g/cc). THe wire is carrying a current of 8milliamp. What is the average drift speed
Interpreting attenuation as a reflection loss calculate the lower limit to the effective reflectivity at the core cladding boundary
A cell membrane is composed of lipid molecules and approximately 11 nm thick, what is the approximate capacitance of a spherical cell that has a diameter of 11mu or micro m
A camera lens used for taking close-up photographs has a focal length of 21.5 mm. The farthest it can be placed from the film is 30.0mm. What is the closest object that can be photographed
Consider a homemade capacitor, which consists of 2 8.5" x 11" aluminum foil sheets separated by 10 sheets of paper. Estimate the capacitance of this device. What effect does the paper have on the capacitance
An astronaut stands by the rim of a crater on the moon, where the acceleration of gravity is 1.62 m/s2. what is the depth of the crater
Light is reflected from a glass coffee table. When the angle of incidence is 50.0°, What is the index of refraction of the glass
Juan and Pablo carry a load weighing 720 N on a pole between them. If the weight of the 120-N pole is considered, what force does each person support
A fan blade rotates with angular velocity given by ?z(t)= ? ? ? t2, where ? = 5.45rad/s and? = 0.835 rad/s3. Calculate the angular acceleration as a function of time
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