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Near Earth, the density of protons in the solar wind (a stream of particles from the Sun) is 8.60 cm-3 and their speed is about 480 km/s. (a) Find the current density of these protons. (b) If Earth's magnetic field did not deflect the protons, what total current would Earth receive?
A conducting bar with a mass of 0.155 kg and a length of 16.0 cm is suspended touching two vertical electrical contacts which form an electric circuit with a battery that has an electric potential of 8.5 V. What is the resistance R that exists in t..
A hurricane wind blows across a 7.10 15.1 flat roof at a speed of 130. How much force is exerted on the roof
An object with mass m = 1.1 g and charge q is placed at point A, which is 0.05 m above an infinitely large, uniformly charged, nonconducting sheet (? = -5.4 10-5 C/m2), as shown in the figure. Gravity is acting downward (g = 9.81 m/s2). Determine the..
Laser light of wavelength 509nm illuminates two identical slits, producing an interference pattern on a screen 86.5cm from the slits, Calculate the width of the slits
An insulating sphere of radius R=0.10 m has a uniform surfacecharge density equal to 5.9 mC/m2. A point charge ofmagnitude 0.71 mC is 0.45 m from the center of the sphere. Themagnitude of the force exerted by the sphere on the point charge is0.024..
two objects are identical and small enough that their sizes can be ignored relative to the distance between them which
A 38.0 mH inductor has a reactance of 1.90 k. What is the frequency of the ac current that passes through the inductor
Two charges are separated by a distance d and exert mutual attractive forces F on each other. what are the new mutual forces
Find the focal length of a glass lens that has an index of refraction equal to 1.66, a concave surface that has a radius of curvature of magnitude 108 cm
You are at a rock concert and find that when you stand 15 m from a speaker, the intensity is so high that it hurts your ears. how far from the speaker should you stand
Two conducting wires of the same material are to have the same resistance. One wire is 17 m long and 0.39 mm in diameter. If the other wire is 0.31 mm in diameter, how long should it be?
An electron is moving in a concentric circular orbit inside asolenoid of radius 4.89 cm, in such a manner that it grazesthe inside surface of the coil at all the points of its orbit. Thespeed of the electron is 9,820 m/s, and the solenoid has3.50×..
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