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A nearsighted person has a far point located only 521 cm from the eye. Assuming the eyeglasses are worn 2 cm in front of the eye, find the focal length needed for the diverging lenses of the glasses so the person can see distant objects.
Two people carry a heavy electric motor by placing it on a light board 2.30m long. One person lifts at one end with a force of 420N , find Where is its center of gravity located
a particle of mass m 4.24times105 evc2 moves in a three-dimensional box with edge lengths l10.54 nm l21.08 nm and
Three 18-cm-long rods form an equilateral triangle. find the electric field strength at the center of the triangle
A coin 1 cm in diameter is embedded in a solid glass ball of radius 20cm. Find the position of the image of the coin and the height of the coin's image
The magnetic field of the earth at a certain location is directed vertically downward and has a magnitude of 50.0 µT. A protonis moving horizontally toward the west in this field with a speedof 6.50*106 m/s.
A simple circuit is set up that only consists of a 12 V battery connected to a light bulb with a resistance of 4 Ohms
find the components of the hiker's total displacement for the trip. Find the magnitude and direction of the displacement from base camp.
You are flying in a 60,000 kilogram plane that is climbing in a straight line at an angle of 15o above the horizontal from an altitude of 9000 meter to an altitude of 11,000 meter with a constant speed of 220 m/s. Obtain the net force acting on the..
A conical pendulum in which the bob moves in a horizontal circle at the end of a long wire. find the centripetal acceleration that the mass experiences
A 70.0cm wire of mass 8.20g is tied at both ends and adjusted to a tension of 41.0N. When it is vibrating in its second overtone, find the frequency at which it is vibrating
An L-R-C circuit, operating at 60 Hz , has an inductor with an inductance of 1.53x10^-3 H , What is the inductive reactance of this circuit
Two 10-cm-diameter charged rings face each other, 21.0cm apart. Both rings are charged to + 50.0nC. What is the electric field strength at the midpoint between the two rings
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