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Three long wires (wire 1, wire 2, and wire 3) hang vertically. The distance between wire 1 and wire 2 is 20.0 cm. On the left, wire 1 carries an upward current of 1.00 A. To the right, wire 2 carries a downward current of 4.20 A. Wire 3 is located such that when it carries a certain current, each wire experiences no net force. Find the following:
(a) the position of wire 3 in cm?
(b) the magnitude and direction of the current in wire 3.
Two spheres of mass m and a third sphere of mass M form an equilateral triangle, and a fourth sphere of mass mB is at center of the triangle.
What's the magnitude of the electric field at an on-axis point a distance of .7m from a ring of charge with a total charge of .8microC
Say you have a piston falling in a cylinder filled with water. The water is plumbed from the bottom of the cylinder to the top, What would the kinetic energy be at the end of a 20m descent
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
You are stranded on a deserted island. You have some wire, but no magnets. You decide to use the Earth's magnetic field, the only one available to you. What area must the coil have
A person whose mass is 72 kg sits on a piston of a hydraulic lift. The radius of this piston is 0.18 m, What is the mass of a puppy
A 8.6cm diameter wire coil is initially oriented so that its plane is perpendicular to a magnetic field of 0.64T pointing up. What is the average induced emf in the coil
A helium gas cylinder has a pressure of 28 atm. What fraction of the original amount of helium remains in the cylinder
In an experiment, light of wavelength 600 nm falls on two slits which are spaced at a distance of .5 mm. What is the distance of the slit to the screen
A thin, horizontal copper rod is 1.20 m long, What is the minimum current in the rod that can cause it to float in a horizontal magnetic field of 2.45 T
A student is trying to decide what to wear. His bedroom is at 17.0°C. His skin temperature is 36.0°C, Find the net energy loss from his body by radiation in 10.7 min
In Larry Niven's science-fiction novel Ringworld, a rigid ring of material rotates about a star. What is the apparent weight of an inhabitant of Ringworld relative to his weight on Earth
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