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Four protons, each with charge +e, are fixed at the corners of a square of side length a. The square is in the +x, +yquadrant of the xy plane with one corner at the origin. Find the magnitude and direction of the electric field E at
(a) the center of the square,
(b) the point (a/2, 0), and
(c) the point (-a, -a).
In each case state which protons contribute to the net electric field you compute and which cancel, and draw a diagram showing the individual electric field vectors due to each proton at the point in question.
The position function x(t) of a particle moving along an x axis is x = 4.5 - 4.5t2, with x in meters and t in seconds.
A horizontal force of 822 N is needed to drag a crate across a horizontal floor with the constant speed. You drag the crate using a rope held at an angle of 34° (from the horizontal).
A certain car battery with a 12.0 V emf has an initial charge of 115 A·h. Assuming that the potential across the terminals stays constant until the battery is completely discharged, for how various hours can it deliver energy at the rate of 110 W.
The platter of a computer hard drive disk rotates at 5400rpm.
parachutist with a camera, both descending at a speed of 13 m/s, releases that camera at an altitude of 110-m.
Just after each jumps, that person is moving away from the crate with a speed of 4.40 m/s relative to the crate.
A box with a mass of 6 kg is lifted (without acceleration) by a height of 6.0 m in order to place it upon the shelf of a closet.
A box slides down a ramp between a delivery area and soring area. You must determine the angle this ramp should have with the horizontal direction so that a 500 pound box takes 5.0 seconds to slide down the ramp starting from rest at the top. While t..
what is the speed of the proton in the beam.define the spread in these values.
Determine the maximum load in terms of theta_min and other quanitites given in the problem introduction.
A vertical scale on a spring balance reads from 0 to 195 rm{N}. The scale has the length of 11.5 rm{cm} from the 0 to 195 rm{N} reading. A fish hanging from the bottom of spring oscillates vertically at a frequency of 2.30 rm{Hz}. What is the m of..
As part of a circuit act, a person drives a motorcycle with constant speed v around the inside of a vertical track of radius r. If the combined mass of the motorcycle and rider is m, find the normal force exerted on the motorcycle by the track at ..
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