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Consider n equal positively charged particles each of magnitude Q/n placed symmetrically around a circle of radius a. (a) compute the magnitude of the electric field at a point a distance x from the center of the circle and on the line passing during the center and perpendicular to the plane of the circle. (Use any variable or symbol stated above along with the following as necessary: ke.) E = (b) Now consider a ring of radius a that carries a uniformly distributed positive total charge Q. Recall the calculation of the electric field at point a point a distance x from the center of the ring and on the line passing during the center and perpendicular to the plane of the ring. Describe why he result in part (a) is identical to the result for the ring.
In coming to a stop, car leaves skid marks 78 long on the highway. Assuming a deceleration of 7.1 estimate the speed of the car just before braking.
A person can survive a feet-first impact at the speed of about 12 m/s (27 mi/h) on concrete; 15 m/s (34 mi/h) on soil; and 34 m/s (76 mi/h) on water. Why are there different values for different surfaces.
A point charge q = 1.45 nC is placed in the center of a spherical cavity of an isolated spherical conductor of inner radius 4 cm and outter radius 12cm
A 10m uniform beam of weight 100 N is supported with two ropes at the ends. If a 400 N person sits at 2.0 m from the left end of the beam, what is the tension in the left rope? (Please provide calculations)
A 25.0 uf capacitor is charged to a potential difference of 850v . The terminals of the charged capacitor are then connected to those of an uncharged 11.0 uf capacitor. Compute the original charge of the system. Compute the final potential difference..
a 0.1 g honeybee acquires a charge of 20 pc while flying. the electric field near the surface of the earth is typically
A thing rod of mass M and lenght l is suspended from a frictionless pivot at its upper end. How high does the bottom of the rod swing
What speed limit should be posted for the curve. How long (in {rm ns}) does it take light incident vertical to the glass to pass through this 9.0 {rm cm}-thick sandwich.
After 2.00 days, the activity of a sample of an unknown type ofradioactive material has decreased to 84.2% of the initialactivity. What is the half-life of this material
Over 500 planets have so far been detected beyond our solar system. This is accomplished by looking for the effect the planet has on the star. The star is not truly stationary; instead, it and its planets orbit around the center of mass of the sys..
question cliff height you are climbing in the high sierra where you suddenly find yourself at the edge of a
A projectile of mass 1.400 kg is shot straight up with an initial speed of 21.0 m/s. How high would it go if there were no air resistance
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