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The crank OA rotates in the vertical plane with a constant clockwise angular velocity ?o of 4.5 rad/s. For the position where OA is horizontal, calculate the force under the light roller B of the 10-kg slender bar AB
A dentist's mirror is placed 2.1 cm from a tooth. The enlarged image is located 5.7 cm behind the mirror. (a) What kind of mirror (plane, concave, or convex) is being used
A 50Ω resistor is placed in series with a 40mH inductor. At what frequency will the current in such a circuit lag the applied voltage by exactly 45 deg.?
The planet Uranus has a radius of 25560km and a surface acceleration due to gravity of 11.1m/s^2 at its poles. Calculate the mass of Uranus from the above data
On an old-fashioned rotating piano stool, a woman sits holding a pair of dumbbells at a distance of 0.565 m from the axis of rotation of the stool. What is the initial angular momentum of the system
Neutron stars are extremely dense objects formed from the remnants of supernova explosions. Find the greatest possible angular speed it can have therefore that the matter at the surface of the star on its equator is just held in orbit by the gravit..
Experiment-Diffraction Grating, Convert λ, wavelength, of laser from nm to m. Remember 1 nm = 1 x 10 -9 m. Average all Δx values to get one Δxavg
The interaction potential energy, U, between two atoms is shown in the figure at the right as a function of the distance separating them, r. The units chosen (eV - electron Volts - for energy, nanometers for distance) are common in describing the mot..
q1. a 346- uniform 1.04- bar is suspended horizontally by two vertical cables at each end. cable a can support a
A bullet is fired through a board 9.0 cm thick in such a way that the bullet's line of motion is perpendicular to the face of the board. Find the total time the bullet is in contact with the board
Two identical parallel-plate capacitors, each with capacitance C, are charged to potential difference ?V and then disconnected from the battery. Find the potential difference across each capacitor after the plate separation is doubled
A gnat takes off from one end of a pencil and flies around erratically for 39.6 seconds before landing on the other end of the same pencil. If the gnat flew a total distance of 6.15 meters, and the pencil is 0.0813 m long, discover the gnat\'s averag..
The combination of an applied force and a friction force produces a constant total torque of 36.6 N · m on a wheel rotating about a fixed axis. The applied force acts for 6.20 s. During this time, the angular speed of the wheel increases from 0 to..
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