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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.
What is the velocity of 5.5kg object with a force of 2.5N while it reaches 6.0 meters, assuming the velocity at zero meters is zero.
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A disk, initially rotating at 149 rad/s, is slowed down with a constant angular acceleration of magnitude 4.23 rad/s2. (a) Explain by how much time does the disk take to stop? (b) Through what angle (rad) does the disk rotate during that time?
Relative to the ground, a car has a velocity of 16.8 m/s, directed due north, What is the magnitude of the truck's velocity relative to the ground
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Describe Erikson, Levinson, cognitive developmental theorists, Kohlberg, behavioral theorists, Bronfenbrenner, Holland, the eclectic theory, and composite theory.
Assume that we suddenly discovered that all these years we would be wrong about the distance from Earth to the Sun, and it is actually 10 percent greater than we would think. How would that affect our approximation of the distance to the Andromeda..
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What is the speed of the projectile
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A 4.25 bullet traveling horizontally with a velocity of magnitude 375 is fired into a wooden block with mass 1.10 , initially at rest on a level frictionless surface. The bullet passes by the block and emerges with its speed reduced to 110 .
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