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Please write no less than one sentence for each question. Explain how electric currents produce magnetic fields and the right-hand rule.
A charge of 20 nC is uniformly distributed along a straight rod of length 4.0 m that is bent into a circular arc with a radius of 2.0 m. What is the magnitude of the electric field at the center of curvature of the arc?
A small car with a mass of 850kg travels northward at 25m/s. Does the car have more or less momentum than a truck with a mass of 10500kg traveling eastward at 17 m/s? How much more or less?
At age forty, a man requires contact lenses (f = 58.0 cm) to read a book held 25.0 cm from his eyes. At age forty-five, he finds that while wearing these contacts he must now hold a book 29.0 cm from his eyes.
The 6.275 kg sledge hammer shown on the right has a small hole drilled at point "P" and a metal rod is inserted to act as a low-friction pivot. When the hammer is displaced slightly and allowed to swing from the pivot, its period of oscillation is ..
A small, 1.80-mm-diameter circular loop with R = 1.00×10-2 ohms is at the center of a large 110-mm-diameter circular loop. What is the induced current on the inner loop
A cylindrical air capacitor with a length of 15.6m stores an amount of energy equal to 3.30×10?9J, Calculate the ratio of the radii of the inner and outer conductors
However the captain of one ferry hears the sound at a frequency of 348Hz, while the captain of the other ferry hears it at a frequency of 347Hz. Find the speed of each ferry. At what distance between the ferries is the sound intensity 82db?
A -19 mC charge experiences a force of 60 N directed south. What is the electric field magnitude and direction at the location of the charge
You are standing midway between a ceremonial cannon and a reflective wall. How far apart are the cannon and the wall
Askater's body has rotational inertia 2.9kg·m2 by his fists held to his chest and 5.7 kg·m2 with arms outstretched. The skater is twirling at 3.0 rev/s while holding 2.3 kg weights in all outstretched hand; the weights are 76 cm from his rotation axi..
The department actually completed 10,000 hours of production. Illustrate what is the appropriate total budget for the department, assuming it uses flexible budgeting?
A crate, mass = 60 kg, is pulled along a horizontal surface with a coefficient of kinetic friction ?= 0. 2 by a rope which makes an angle of 53 degrees with the horizontal. What is the acceleration of the crate
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