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A capacitor of capacitance c=60 uf is connected in series with a resistance R=500 ohm and voltage g=10 v. (a) when does the capicator reach 20% of its maximum charge? (b) what is the voltage in the circuit at that moment? (Start from the loop equation and derive all required).
four balls each of mass m are connected by four identical relaxed springs with spring constant k. the balls are
Through a thunderstorm, 3.8 s elapses between observing a lightning flash and hearing the resulting thunder. About how far away in kilometres and miles was the lightning flash?
A potter's wheel (a solid, uniform disk) of mass 6.0kg and radius 25cm spins about its central axis with an angular speed of the wheel is 15rpm, Find the new angular speed of the system in rpm
Andy (mass 77kg ) uses a 2.7m -long rope to pull Bob (mass 61kg ) across the floor (μk=0.20) at a constant speed of 1.0m/s. What is the mass of the rope
A river flows at a speed of 12m/s from north to south. A powerboat can move at a constant maximum speed of 23 m/s in still water. find the maximum velocity of the boat traveling upstream
A 50kg box is placed on an inclined plane making an angle of 30 degrees with the horizontal, what is the resultant force on the box
A ship is floating on a lake. Its hold is the interior space beneath its deck; the hold is empty and is open to the atmosphere. What volume of water per second leaks into the ship
Two wires A and B of circular cross-section are made of the same metal and have equal lengths, What is the ratio of their cross section area
A charge of 20 nC is uniformly distributed along a straight rod of length 4.0 m that is bent into a circular arc with a radius of 2.0 m
A right triangle has a hypotenuse of length 2.90 m, and one of its angles is 38.0°. What are the lengths of the following sides. a: the side opposite the 38.0° angle b: the side adjacent to the 38.0° angle
A 380-N, uniform, 1.50 m bar is suspended horizontally by two vertical cables at each end. A small object of weight 520 N is placed distance 0.5 m from the cable A. What is the tension in cable A.
When Skylab recentered the Earth's atmosphere on July 11,19790, it broke into a m,yraid of pieces. What was the kinetic energy of the film vault when it landed
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