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Work for an octahedron **
Three protons and three electrons are to be placed at the vertices of a regular octahedron of edge length a. We want to find the energy of the system, that is, the work required to assemble it starting with the particles very far apart. There are two essentially different arrangements. What is the energy of each?
Wire is often delivered wrapped on a large cylindrical spool. Suppose such a spool is supported by resting on a horizontal metal rod that is pushed through a hole that runs through the center of the spool. A worker is pulling some wire off the spo..
A contact lens is made of plastic with an index of refraction of 1.60. The lens has an outer radius of curvature of +2.10 cm and an inner radius of curvature of +2.58 cm. What is the focal length of the lens
A particle of charge q = e moves in a circle of radius = 0.46m with speed v = 2.800×107 m/s.Treating the circular path as a current loop with constant currentequal to its average current, find the maximum torque exerted on the loop by a uniform mag..
A string wrapped around a peg (diameter=2.00 cm) along the axis of a top is pulled with a constant tension of 5.92 N. what is the moment of inertia of the top
The centers of a 11.0kg lead ball and a 150g lead ball are separated by 7.00cm. What gravitational force does each exert on the other
The headlights on a certain car are gauged to be 1.1 m apart. The diameter of the pupil in a human eye is 2.5 mm. What is the FURTHEST DISTANCE at which a human eye could clearly see the headlights as 2 separate lights? Utilize a wavelength of 617 nm..
A pile driver is a device used to drive stakes into the ground.While building a fence, How far is the stake driven to into the ground on the first stroke
An experimental bicycle wheel is placed on a test stand so that it is free to turn on its axle. What is the torque supplied by friction
Consider a spider walking from the top of a (stationary) beach ball. (Let that angular position = 0O.), At what angle does this slipping begin
If the football has a mass of 0.47kg and the time of contact with the ball is 0.021s, what is the force exerted by the ball on the kicker's foot.
Suppose you are standing at the bottom of a swimming pool looking up at the surface, which we assume to be calm. Looking up, you will see a circular window to the "outer world." If your eyes are approximately1.6meters beneath the surface, what is ..
which is true about the capacitance of a parallel-plate capacitor?a it is proportional to both the plate separation and
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