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A point charge (m=1 g) at the end of an insulating string of length 55 cm is observed to be in equilibrium in a uniform horizontal electric field of 12000 N/C where the pendulum's position is as shown in the figure, with the charge 12 cm above the lowest(vertical ) position. If the field points to the right, determine the magnitude and sign of the point charge.
A particle with charge of 4 microcoloumbs is at the origin, another identical particle is placed 2 m from the origin on the positive x-axis and another 2 m on the positive y-axis. (1) Provide a sketch with vectors representing the forces on the ch..
A 12.1-kg cylinder rolls without slipping on a rough surface. At an instant when its center of gravity has a speed of 10.6 m/s, find the rotational kinetic energy about its center of gravity
to focus a camera on objects at different distances the converging lens is moved toward or away from the film so a
The resistance of a conductor is 19.2 ohms at 1.50 degress C and 25.0 ohms 91.0 degress C. What is the temperature coefficient of the resistance
Two atomic particles approach each other in a head-on collision. Each particle has a mass of 1.81 x 10-25 kg. The speed of each particle is 2.13 x 108 m/s when measured by an observer standing in the laboratory.
The drawing shows a mercury barometer. Consider two barometers, one using mercury and another using an unknown liquid. assume that the pressure above the liquid in each tube is negligible. The height of the unknown liquid is 18.3 times greater tha..
A block of mass M= 100 kg is sliding down an inclined at an angle q= 30 degree above the horizontal. Find the acceleration of the block down the incline
A sanding disk withrotational inertia 1.7 10-3 kgm2 isattached to an electric drill whose motor delivers a torque of8 Nm about the centralaxis of the disk. determine the angular momentum of the disk
A converging lens (f = 36.9 cm) is used to project an image of an object onto a screen. Find the two object distances
Harold the Hurler is a physics student who is renowned for his baseball pitching arm. How much work does Harold perform on the baseball
A train 389 m long is moving on a straight track with a speed of 40.6 m/s. The engineer applies the brakes at a crossing, find how long (in s) the train blocked the crossing
consider a 160 turn circular conducting coil with a radius of 15.4 cm. this coil rotates about an axis which passes
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