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You want to get an idea of the magnitude of magnetic fields produced by overhead power lines. You estimate that a transmission wire is about 11 m above the ground. The local power company tells you that the line operates a 11 kV and provide a maximum of 48 MW to the local area. Estimate the maximum magnetic field you might experience walking under such a power line, and compare to the Earth's field. [For an ac current, values are rms, and the magnetic field will be changing. Let the Earth's magnetic field strength be 5.0 10-5 T.]
a skier of mass 100 kg, starts from rest as the top of a frictionless incline of height 20 m, how far does she travel on the horizontal surface before coming to rest
An object, of mass m = 3 kg, is released from a height h = 5 m of the top of a rough 45 incline, Determine the maximum height on the left incline that the object will reach before sliding back again to the right
Three point charges are located on the x-axis. The first charge, q1= 10uC, is at x= -1.00m; the second charge, q2 = 20.0 uC,, Find the force that each charge is subjected
An all-electric car (not a hybrid) is designed to run from a bank of 12.0-V batteries with total energy storage of 2.10 X 10^7 J. How far can the car travel before it is "out of juice"
A gas is contained in a vertical, frictionless piston-cylinder device. The piston has a mass of 4 kg and a cross-sectional area of 40 cm2. Determine the pressure inside the cylinder
Suppose Q and nQ are charges that are seperated from origin by -L and oL and the origin and that the origin as at a point of electrostatic equilibrium between them
an object is placed 12.0 cm in front of the cornea. the cornea is thin ans has approximately parallel sides so that the
A 2.3 µF capacitor and a 5.3 µF capacitor are connected in parallel across a 320 V potential difference. Calculate the total energy in joules stored in the capacitors
A 121 cm length of string has a mass of 2.40 g. It is stretched with a tension of 6.80 N between fixed supports. What is the lowest resonant frequency of this string
a 900.0 N hiker stops 1/3 of the way across a 3600.0 N bridge. Find the normal force acting on concrete supports at each end of the brige
A bunch of grapes is placed in a spring scale at a supermarket. The grapes oscillate up and down with a period of 0.65 s, What is the mass of the grapes
A soap bubble strongly reflects light of 463nm, wavelength, if the index of refraction of the film is 1.35, what is the thinnest thickness the soap film can be
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