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A potter's wheel having a radius 0.53 m and a moment of inertia of 14.9 kg · m2 is rotating freely at 46 rev/min. The potter can stop the wheel in 4.0 s by pressing a wet rag against the rim and exerting a radially inward force of 72 N. Find the effective coefficient of kinetic friction between the wheel and the wet rag.
What should be the spring constant of a spring designed to bring a 1500 car to rest from a speed of 80 so that the occupants undergo a maximum acceleration of 5.
A student drops a ball from the top of a tall building; the ball takes 3.1s to reach the ground. What is the height of the building
The average resistivity of the human body is 5 ohm*m. The conducting path between two hands is approximated as a cylinder with length 1.6m, what is the resistance between the hands
q1. the active element of a certain laser is made of a glass rod 33.0 cm long and 1.60 cm in diameter. assume the
The blue ball moves at an angle of -35° and a velocity of 2.1 meters/second. What is the final y-momentum of the system?
The dial on an AM radio contains numbers ranging from about 530 to about 1600. What is the corresponding range of wavelengths
A proton moves at a speed of 995 m/s in a direction perpendicular to a magnetic field with a magnitude of 0.76 T
A radio telescope, whose two antennas are separated by 55 , is designed to get 3.0- radio waves produced by astronomical objects.
A very long solenoid with a circular cross section and radius r= 8.10 cm with n= 1.50E 4 turns/m has a magnetic energy density uB= 6.40 mJ/m3. What is the total energy stored in the solenoid
The escape velocity of a bullet from the surface of planet Y is 1823 m/s. Calculate the escape velocity from the surface of the planet X if the mass of planet X is 1.47 times that of Y,
You are given the job of evaluating potential power line systems. What percentage of the power would be dissipated in the low-voltage power line
An undamped 1.16-kg horizontal spring oscillator has a spring constant of 38.9 N/m. While oscillating, it is found to have a speed of 3.18 m/s as it passes through its equilibrium position. What is its amplitude of oscillation
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