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Consider a circular loop of wire lying in the same plane but to the north of a very long straight current directed eastward. Find the direction of the current induced in the loop if the straight current suddenly
(a) reduced to zero and
(b) doubled. Explain your answer in both cases.
A light wave has a 670{\rm nm} wavelength in air. Its wavelength in a transparent solid is 420{\rm nm}. What is the light's frequency in the solid
An airplane flies 200 km due west from city A to city B and after that 295 km in the direction of 26.5° north of west from city B to city C.
A force F= (6x - 2y)N acts on a particle that undergoes a displacement delta r= (3x + y)m. Find (a) the work done by the force on the particle and (b) the angle between F and r.
Four identical particles, each with mass m = 10-6 kg and charge Q = 10-6 C, are initially at the four corners of a square with side-length a = 0.01 m. what is the final speed of the released particle once it is very far away
A constant force is applied to an object, causing the object to accelerate at 6 m/s^2?, What will the acceleration be if the force is halved
A high diver of mass 65kg jumps off a board 10m above the water. If her downward motion is stopped 1.70 s after she enters the water, what average force did the water exert on her.
A swimmer dived off a cliff with a running horizontal leap. What must his minimum speed be just as he leaves the top of the cliff
The water passing over Victoria Falls, located along the Zambezi River on the border of Zimbabwe and Zambia, How much internal energy is produced per kg as a result of the fall
The proper length of one spaceship is 2.8 times that of another. The two spaceships are travelling in the same direction and, while both are passing overhead, an Earth observer measures the two spaceships to be the same length.
Students hypothesized that by running the electric current through the wire of the apparatus shown here, they could cause the non-magnetic nail to exhibit magnetic properties. What would be a reasonable way to test this.
Two point charges 3.0cm apart have an electric potential energy -130J . The total charge is 15nC. What is the lesser charge
suppose that the gold ions carry one elementary unit of positive charge.
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