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A charged line of linear charge density ? has been bent into a circular arc of radius r that makes an angle ? with its center. (A). Find the magnitude of the electric field at the center of this arc. (Does your result make sense, what should it be if the arc were increased to a full circle? How about if it were shrunk to an angle of 0?) (B). Where would a point charge of the same total charge as the arc need to be placed in order to make the electric field at the center of the arc equal to zero? (Hint: X and Y axes have not been chosen for you, you will have to choose your own. If you consider symmetry, you can choose them so that the electric field at the center only points in either the X or Y direction. Make sure to include a diagram showing your choice. More Hints: How does the magnitude of the electric field contributed by each little segment of arc compare to the contributions from the other segments? Do we just straight up add these magnitudes?)
The coefficient of kinetic friction between block and ramp
A person pulls a 26kg suitcase using a rope attached to the suitcase at an angle of 28 degrees to the horizontal. The coefficient of static friction of the suitcase with the floor is 0.3 and the coefficient of kinetic friction is 0.20.
A conducting rod of length 0.5 m slides along a frictionless table at a constant velocity 1.5 m/s. A uniform magnetic field of 0.75 T is normal to the surface.
A 67 kg man weighs 637 N on the Earth's surface. How far above the surface of the Earth would he have to go to "lose" 19 percent of the body weight.
Find out the angular velocity at the beginning of the 4.60 interval; the angular acceleration of the flywheel.
A duck has a mass of 2.6 kg. As the duck paddles, a force of 0.11 N acts on it in a direction due east. In addition, the current of the water exerts the force of 0.12 N in a direction of 44° south of east. When these forces begin to act, the velocity..
A reflecting, spherical Christmas tree ornament has a diameter of 20 cm. A child looks at the ornament from a distance of 40 cm. define the image she sees. Where is the image locate.
A charge of 140 µC is at the center of a cube of edge 60.0 cm. No other charges are nearby. (a) Find the total flux through each face of the cube. (b) Find the flux through the whole surface of the cube. N·m2/C (c) Would your answers to parts (a) ..
find What is the impulse delivered by the bat.
Calculate the rates of solar heating
The motion of peg P is constrained through the lemniscate curved slot in OB and by the slotted arm OA.
A vessel whose walls are thermally insulated contains 2.3 kg of water and 0.35 of ice, all at the temperature of 0.0 . The outlet of a tube leading from a boiler in that water is boiling at atmospheric pressure is inserted into the water. How many..
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