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A light board, 10 m long, is supported by two sawhorses, one at one edge of the board and a second at the midpoint. A 40-N weight is placed between the two sawhorses, 3.0 m from the edge and 2.0 m from the center. A second weight with a mass of 15 N, is placed at the end of the board. What is the force exerted by the sawhorse at the end of the board?
A charged particle is injected at 215 m/s into a 0.0739-T uniform magnetic magnetic field perpendicularly to the field. What is the charge-to-mass ratio of this particle
A 43.5 mA current is carried by auniformly wound air-core solenoid with 460 turns, a 17.0 mmdiameter, and 11.0cm length. Compute the magnetic flux through each turn
Two objects attract each other gravitationally with a force of 3.1×10?10N when they are 0.45m apart. One of the object has a mass of 2.0kg. Find the mass of the other object
A trap door, of length and width 2.75 m, is held open at an angle of 65.0° with respect to the floor. what is the torque exerted on the trap door by the rope
A sphere of radius 6.21 cm and uniform surface charge density, Find the separation between the point charge and the center of the sphere
A solenoid of radius 1.6 cm has 351 turns and a length of 10 cm.The permeability of a free space is 1.25664 × 10^?6 V · s/A · m. Find the rate at which current must change through it to produce an emf of 56 mV
a ball is tossed directly upward at an initial speed of 5.7m/s and is caught when it falls back down to the throwers hand, how much total time is the ball airborne
A wall consists of 2 layers of material: brick in front of an equal thickness of wood. how does the temperature gradient across the wood compare to the gradient across the brick
Suppose the skin temperature of a naked person is 34.3 °C when the person is standing inside a room whose temperature is 21.3 °C. Assuming the emissivity is 0.673, find the net loss of radiant power from the body
A parallel-plate capacitor in air has circular plates of radius 3.8 cm separated by 1.1 mm. Find the time rate of change of the electric field between the plates
A ball is thrown toward a cliff of height h with a speed of 31m/s and an angle of 60 degrees above horizontal. What was the maximum height of the ball
A double-slit experiment using light of wavelength 580.nm produces an interference pattern on a screen. The slit separation is 1.39?10?2mm. find the distance between the slits and the screen
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