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Two uniformly charged insulating rods are bent in a semicircular shape with radius r = 11.9 cm. If they are positioned so they form a circle but do not touch and have opposite charges of +8.19 µC and -8.19 µC, find the magnitude of the electric field at the center of the composite circular charge configuration.
In a museum exhibit, three equal weights are hung with identical wires. Each wire can support a tension of no more than 72.0N without breaking. Under these conditions, what is the tension in the middle wire
A train starts from rest and accelerates at a rate of 1.70m/sfor 13.8s it runs at constant speed for 69.9s andslows down at a rate of 3.48m/s until it stops, find total distance covered
A system has three energy levels. The ground state is nondegenerate; however the first and second excited states, energies e1 and e2, respectively, have degeneracies of 3 and 2, respectively. Find the average energy at temperature T.
A 200 g block hangs from a spring with spring constant 10 N/m. At t=0 s the block is 23 cm below the equilibrium point and moving upward with the speed of 125 cm/s. What are block's oscillation frequency? What is the block's distance from equilibri..
What is the current in the circuit when all six lamps and the heater are turned on? If the circuit has a fuse which will melt if the current exceeds 12 A, will fuse melt.
A person of mass 80.0kg stands at the center of a rotating merry-go-round platform of radius 2.50m and moment of inertia 910kg*m^2. Calculate the rotational kinetic energy of the system of platform plus person before and after the person's walk
A 5.0 kg box is pushed with a force of 12N across a smoothfloor for a distance of 10 meter. Calculate the total work done on the box
Some believe that the positions of the planets at the time of birth influence the newborn. Calculate the gravitational force exerted on the baby by the planet Jupiter (m=1.9*10^27 kg) at its closest approach to the earth
An unknown amount of current when passed through a resistance of R1 ? develops a voltage of 100 V and when passed through a resistance of R2 ?, How did you arrive at this conclusion
Four identical cells, each of emf 2V are joined in parallel providing supply of current to external circuit consisting of two 15 ohm resistors joined in parallel, Calculate the internal resistance of each cell
A hockey puck B rests on a smooth surface of ice and is struck by a second puck A , which was originally traveling at = 40.0, What fraction of the original kinetic energy of puck A dissipates during the collision
When a 19.6 kg wheel with an angular speed of 2.20 rad/s is disconnected from a motor, a 0.238 N · m frictional torque slows the wheel to a stop. how long will it take for the wheel to come to rest
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