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1. Electric Potential
For the charge distribution given figure 1, each gridline represents 1 cm and Q = 2* 104 C. A negative test charge q = -5* 10"5 C and m = 12*10-7 kg is then placed at Point P and released. Make a model (system schema, energy bar charts, electric potential lines, word explanation of the motion) and calculate the speed of the test charge when it is 0.1 cm away from the positive charge.
2. Liner Charge Distribution
Consider the charge distribution, shown in figure 2, where a charge of Q = 56 nC is uniformly distributed over a semi-circle of radius r = 2 cm. Construct the integral that gives the exact voltage at Point P, located in the center of the circle. (Note: you do NOT have to solve the integral.) Explain what each quantity represents and what you are doing at each step.
During an adiabatic expansion the temperature of 0.430 moles of argon (Ar) drops from 54 C to 15 C. How much work does the gas do
A laptop computer communicates with a router wirelessly, bymeans of radio signals. The router is connected by cabledirectly to the Internet. The laptop is 8.1 m from therouter, and is downloading text and images from the internet at anaverage rate..
The potential at a distance of 30.0 cm from a very small charged sphere is 46.0 V relative to infinity. If the sphere is small enough to be treated as a point charge, how much excess charge does it carry? (Q=?) What is the potential at a distance of ..
The mass of an object is 386 gram, and its volume is determined to be 25 cc. Estimate what is the mass density of the object
A 50 kg steel file cabinet is in the back of a dump truck. The truck's bed, also made of steel, is slowly tilted. What is the size of the static friction force on the cabinet
An object is thrown straight up. Two seconds later it is still going upward and at that time its speed is 10m/s. What was the initial speed of the object? What is the highest height of the object?
A bullet is fired from the ground at an angle of 45o, Find what initial speed must the bullet have in order to hit the top of a 400 feet tower placed 600 feet away
The electric motor of a model train accelerates the train from rest to 0.740 meter per second in 30 milliseconds. Obtain the average power delivered to the train during its acceleration
A charge Q is uniformly distributed throughout a non conducting sphere of radius R. Evaluate what the charge density in the sphere
A spherical water drop, 1.70 meter in diameter, is suspended in calm air owing to a downward-directed atmospheric electric field E = 502 N/C. Determine how many excess electrons does the drop have
Ash "the working bee" decides to gather pollen and in her quest flies 50 meters from a beginning point at 0° along the west and finds nothing. Determine the displacement and direction of the bee
radium ra decays to radon rn which decays to polonium. if at t 0 a sample is pure radium how much polonium does it
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