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Two wheels have the same mass and radius of 5.0 kg and 0.38 m,respectively. One has (a) the shape of a hoop andthe other (b) the shape of a solid disk. Thewheels start from rest and have a constant angular acceleration with respect to a rotational axis that is perpendicular to theplane of the wheel at its center. Each turns through an angle of 12rad in 8.4 s. Find the net external torque that acts on each wheel.
Find the change in volume of an aluminum sphere of 5.2 cm radius when it is heated from 18.0 °C to 296.0 °C. The linear coefficient of thermal expansion of aluminum is 2.300×10-5 /°C.
a laser beam with a wavelength of 532 is directed exactly perpendicular to a screen having two narrow slits spaced
A beam contains 8.1x106 doubly charged positive ionsper cubic centimeter, all of which are moving north with a speed of7.3x105 m/s. What is the magnitude of the current density?
You push with a horizontal force of 50.0N against a 24.0N box, pressing it against a rough wall to hold it in place. what is the friction force of the box
A 2000kg car traveling at a speed of 12m/s skids to a halt on wet concrete where ?k = 0.50. How long are the skid marks
question1consider an array of parallel wires with uniform spacing of 1.30 cm between centers. in air at 20.0degc
A closely wound, circular coil with radius 2.40cmhas 850 turns. What must the current in the coil be if the magnetic field at the center of the coil is 0.0600T
A wire 11.80 m long carries a current of 1.30 A and makes an angle of 35.0 degrees with a uniform magnetic field of magnitude B=10.50 T. Calculate the magnitude of the magnetic force on the wire.
a 0.223 kg ball is thrown straight up from 1.81 m above the ground. its initial vertical speed is 8.40 ms. a short time
A 16.5-m-long cable consists of asolid-inner, cylindrical, nickel core 2.0cm in diameter surrounded by a solid-outer cylindrical shell ofcopper 2.0 cm in inside diameter and4.0 cm in outside diameter. There sistivity of nickel is 7.8*10-8 Ω · m, a..
A 3.34 bullet moving at 280 enters and stops in an initially stationary 3.40 wooden block on a horizontal frictionless surface. How much work was done in stopping the bullet
what is the bragg scattering angle for electrons scattered from a nickel crystal if their energy is each of the
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