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A playground carousel is rotating counterclockwise about its center on frictionless bearings. A person standing still on the ground grabs onto one of the bars on the carousel very close to its outer edge and climbs aboard. Thus, this person begins with an angular speed of zero and ends up with a nonzero angular speed, which means that he underwent a counterclockwise angular acceleration. The carousel has a radius of 1.53 meter, an initial angular speed of 3.21 rad/s, and a moment of inertia of 120kg•m2. The mass of the person is 42.2 kilogram. Find the final angular speed of the carousel after the person climbs aboard.
A parallel-plate capacitor has plates of area 0.16 m2 and a separation of 2.80 cm. What is the capacitance before the slab is inserted
A parallel-plate capacitor has plates of area 177.0 cm2 and a separation of 1.85 cm. Find the capacitance before the slab is inserted
Two point charges are placed along a horizontal axis with the following values and positions: +1 µC at x = 0 cm, At what point (the coordinate) along the x axis is the electric field zero
An air-filled (suppose k=1) parallel-plate capacitor has plates of area 2.30 cm2 separated by 1.50 mm. What is the charge on the capacitor
A piccolo and a flute can be approximated as cylindrical tubes with both ends open. What is the ratio of the piccolo's length to the flute's length
A man is in a chair that is attached with a rope that goes over amass less, frictionless pulley and back down to the man's hand. Combined mass is 104.0 kg. With what force should he pull the pulley in order to rise with a constant velocity?
A 2.30-g bullet embeds itself in a 1.40-kg block, which is attached to a spring of force constant 780N/m, Find the time for the bullet-block system to come to rest
A diffraction grating with 600 lines per mm is illuminated with light of wavelength 520. What is the distance between the two fringes
A weather balloon is designed to expand to a maximum radius of20 m at its working altitude, what is its radius at lift off
A long, straight wire of length 1.5 mcarries a current of I = 6.0A. If a magnetic field of magnitude B = 1.3 T is directed perpendicular to the wire, what is the magnitude of the force on the wire?
A bird flies 3.05 km due west and then 3.26 km due north. Another bird flies 1.03 km due west and 1.16 km due north. Determine the angle with respect to the 2nd bird's displacement vector
the resistor in an rc circuit has a resistance of 140 ohms. using the capacitance c 26 uf calculate the current in
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