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A potter's wheel having a radius 0.48 m and a moment of inertia of 12.3 kg · m2 is rotating freely at 55 rev/min. The potter can stop the wheel in 7.5 s by pressing a wet rag against the rim and exerting a radially inward force of 65 N. Find the effective coefficient of kinetic friction between the wheel and the wet rag.
A 240g block on a 60cm-long string swings in a circle on a horizontal, frictionless table at 70rpm.
How is sound produced and how are standing waves set up in the instruments? Key words: incident, reflected, interference, wavelength, string/pipe length
A copper block is removed from a 300°C oven and dropped into 1.00 kg of water at 20.0°C. The water quickly reaches 26.5°C and then remains at that temperature. What is the mass of the copper block?
In a purely inductive AC circuit, L=25.0 mH and the rms voltage is 150 V. Calculate the inductive reactance and the rms current in the circuit
When the cylinder is rotating at 2.0 revolutions per second, determine the magnitude of the centripetal acceleration at the outer wall?
At an intersection of hospital hallways, a convex mirror is mounted high on a wall to help people avoid collisions. Using a scales 3-ray diagram, locate and describe the image of a patient 10.0 m from the mirror.
a ball mass of 5 grams and radius of 1.5 cm is rolled up a frictionless ramp that is 30 degrees above horizontal with an iniitial velocity of 4 m/s
An air-filled capacitor consists of two parallel plates, each with an area of 7.60 cm2, separated by a distance of 1.70 mm. evaluate the electric field between the plates
A hot-air balloon has just lifted off and is rising at the constant rate of 2.4m/s. how high is she when the camera reaches her
A uniform rod of length 0.790 m and mass 14.50 kg is balanced on a sharp edge at 0.650 m from the left end. At the left end hangs a mass of 45-kg and the right end hangs an unknown mass so that the whole assembly is in equilibrium.
Through what maximum angle θmax will the reference line turn in the positive direction? What are (b) first and (c) second times the reference line will be at θ = θmax/3? At what (d) negative time and (e) positive time will the reference line be at..
find the angular displacement of the propeller.
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