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Four point charges of magnitude 2µC are at the corners of a square with sides 4m. If this configuration was assembled from charges initially very far apart (at infinity) find the change in electrostatic potential if a) All the charges are negative. b) Three of the four charges are positive and one is negative. c) Two are positive and two are negative.
An air-track glider attached to a spring oscillates between the 16.31 cm mark and the 51.41 cm mark on the track. What is the maximum speed of the glider
a wire carrying a current is placed in a uniform magnetic field. When a current of 3.7A flows in the wire there is a force of 0,075N on each 18cm of wire in the field
the problem is accompanied with a graph representing U in function of R, the curve begines at a certain point above the R axis , then decreases continuously, crosses the R axis and has a minimum at the coordinate (Ro,e), then decrease anew but sta..
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 ..
A commercial airliner is undergoing its initial ascent while the pilot maintains a cabin environment of T = 23 C, r = 0.35, and p = 880 hPa. At the 670 hPa level an exit door ruptures and cabin pressure rapidly decompresses. Will clouds form in the c..
Three insulating balls are suspended from thin threads. Various objects are then rubbed against other objects and each of the insulating balls is charged by touching them with one of these objects. In each case.
A 1.50 103-kg car starts from rest and accelerates uniformly to 15.8 m/s in 13.0 s. Assume that air resistance remains constant at 400 N during this time. Find the average power developed by the engine
The flux in a transformer changes at a rate of 0.4 Wb/s. The primary coil has 40 turns and the secondary coil has 500 turns
A bullet of mass 4.00g is fired horizontally into a wooden block of mass 1.26kg resting on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.240. What was the initial speed of the bullet
Gold is the most ductile of all metals. For example, one gram of gold can be drawn into a wire 2.25 km long. What is the resistance of such a wire at 20°C
A transformer has 100 turns in its primary windings and 500 turns in its secondary winding. calculate the secondary voltage and current
Nothing, the charges are too cold to deliver any response. D. There is a localization of negative charge near the door handle.
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