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A 101-kg horizontal platform is a uniform disk of radius 1.97 m and can rotate about the vertical axis through its center. A 67.9-kg person stands on the platform at a distance of 1.19 m from the center and a 27.3-kg dog sits on the platform near the person, 1.39 m from the center. Find the moment of inertia of this system, consisting of the platform and its population, with respect to the axis.
A ball is thrown from a point 1.0 m above the ground. The initial velocity is 19.5 m/s at an angle of 27.0° above the horizontal. Find the maximum height of the ball above the ground
An uncharged 20 uF capacitor is connected to a power supply set to 10 V. how much more charge flows onto the plates
A long wire is known to have a radius greater than 5.2 mm and to carry a current that is uniformly distributed over its cross section, What is the radius (in mm) of the wire
A car travels north at 28.9 m/s for 14.3 min. It then travels south at 40.1 m/s for 28.5 min. a) What is the total distance the car travels? b) What is the displacement of the car?
A transformer is to be used to provide power for a computer disk drive that needs 7.0 V (rms) instead of the 120 V (rms) from the wall outlet. Find the number of turns in the secondary
A 0.359-kg mass is attached to a horizontal spring with k = 108 N/m. The mass slides across a frictionless surface Find the mechanical energy of the system
Two 125 W (122 V) lightbulbs are wired in series, How much power is dissipated by each bulb
A thin metallic spherical shell of radius 41.6 cm has a total charge of 8.05 ?C uniformly distributed on it. At the center of the shell is placed a point charge of 2.83 C. What is the electric field at a distance of 23.9 cm from the center of the ..
A sample contains 8.30×104 radioactive nuclei. In a time of 5 minutes, Evaluate the half life of the sample
Calculate the distance Michael will travel if he maintain an average speed of 2.7 m/s for 7.2 seconds
A kid slides down from the top of a 3m high frictionless slide. When he reaches the bottom of the slide, he travels over a 2m long carpet with a 0.20 coefficient of kinetic friction, What height does he return to on the slide
An 85 kg spacewalking astronaut pushes off a 655 kg satellite, exerting a 115N force for the 0.600 s it takes him to straighten his arms.
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