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Four protons are placed at the corners of a square of side length a = 1.0 angstrom. The square is in the +x, +y quadrant of the xy plane with one corner at the origin. Find the electric field magnitude and direction
(a) at the center of the square, (b) at the point (-a, -a), and (c) at the point (½a, 0). In each case state which protons contribute to the net electric field you compute and which cancel, and draw a diagram showing the electric field vectors due to each individual proton at the point in question.
You're using a rope to pull a sled at constant velocity across level snow,with coefficient of kinetic friction 0.050 between sled and the snow. The sled is loaded with physics books, giving a total mass of 21 kg.
A bare helium nucleus has two positive charges and a mass of 6.64 multiplied by 10-27 kg. What voltage would be needed to obtain this energy
A crate is pulled to the right with a force of 93.7 N, to the left with a force of 127.9 N, upward with a force of 563.6 N, and downward with a force of 238.1 N. What is the net external force in the x direction? What is the net external force in ..
The launching mechanism of a toy gun consists of a spring ofunknown spring constant. determine the speed of the projectile as it moves through the equilibrium position ofthe spring
A car is being pulled out of the mud by two forces that are applied by the two ropes shown in the drawing. The dashed line in the drawing bisects the 30.0° angle.
A proton moves with a speed of 2.4 106 m/s horizontally, at the right angle to a magnetic field. What magnetic field strength is required to just balance the weight of the proton and keep it moving horizontally.
A hydrogen atom emits a photon of energy 3.4 eV. If the atom is at rest before emitting the photon, what is the speed of the atom after emission?
a particle of mass 110-5 kg has a negative charge of -10 c. it moves in a clockwise circular pattern of radius 2m at a
A satellite is in a circular orbit about the earth (ME = 5.98 1024 kg). What is the speed at which the satellite travels
A dog searching for a bone walks 2.20 m south, then 8.20 m at an angle 30.0° north of east, find the dog's resultant displacement vector
A 8.0x10^-2-kg ice cube at 0.0 C is dropped into a Styrofoam cup holding 0.35 kg of water at 11 C. Find the final temperature of the system. Find the amount of ice (if any) remaining. Find the initial temperature of the water that would be enough to ..
A playground merry-go-round has a radius of 4.40 m and a moment of inertia of 255 kg*m^2 and turns with negligible friction about a vertical axle through its center. What is the average power supplied by the child
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