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The primary coil of a transformer has N1 = 390 turns, and the secondary coil has N2 = 2 260 turns. If the input voltage across the primary coil is ?v(t) = 170 cos ?t, where ?v is in volts and t is in seconds, what rms voltage is developed across the secondary coil?
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1.00 ×1020electrons flow through a cross section of a 3.90?mm?diameter iron wire in 4.50s . The electron density of iron is n =8.5×1028m?3
an electron in a hydrogen makes a transition between levels and emits a photon with a frequency of 6.91*10^14 hz . find is the electron jumping to higher or lower level
You are at a rock concert, and the sound intensity reaches levels as high as 120 dB. Calculate the amplitude of this oscillating force
A dead battery is charged by connecting it to the live battery of another car with jumper cables. Determine the current in the dead battery
The drawing shows an equilateral triangle, each side of that has a length of 2.00 cm. Point charges are fixed to each corner, as shown. The +4.0 C charge experiences a net force due to the charges qA and qB. This net force points vertically downwa..
A guitar string of diameter 0.79 mm and length 1 m is subject to a tension of 182 N. what is the Young's modulus of the string
a point charge q = +87.1 micro coulombs is held fixed at the origin. A second charge, with mass m = 0.0576 kg and charge q = +3.5 micro coulombs, Find the electric potential energy of the system of charges
A set of jumpers cables used to start a car from another car's batterty is connected to the terminals of both batteries. What is the force per unit length on the cables
you're helping with an experiment in which a vertical cylinder will rotate about its axis by a very small angle. you need to devise a way to measure this angle. you decide to use what is called an optical lever. How many degrees has the cylinder ro..
Two particles with masses 4m and 3m are moving toward each other along the x axis with the same initial speeds vi. Find the final speeds of the particles
Consider a standing wave on the string with a frequency equal to the fifth harmonic (fn = nf1 with n = 5). How many nodes and antinodes does this standing wave possess.
How far from the firing point is the height of the projectile.
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