Physics, 16.03.2020 21:11 jsharma57p7enrw
The magnitude J(r) of the current density in a certain cylindrical wire is given as a function of radial distance from the center of the wireās cross section as J(r) ! Br, where r is in meters, J is in amperes per square meter, and B ! 2.00 $ 105 A/m3.This function applies out to the wireās radius of 2.00 mm. How much current is contained within the width of a thin ring concentric with the wire if the ring has a radial width of 10.0 mm and is at a radial distance of 1.20 mm?
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Astudent throws a water balloon with speed v0 from a height h = 1.76 m at an angle Īø = 21Ā° above the horizontal toward a target on the ground. the target is located a horizontal distance d = 9.5 m from the studentās feet. assume that the balloon moves without air resistance. use a cartesian coordinate system with the origin at the balloon's initial position. (a) what is the position vector, rtarge t, that originates from the balloon's original position and terminates at the target? put this in terms of h and d, and represent it as a vector using i and j. (b) in terms of the variables in the problem, determine the time, t, after the launch it takes the balloon to reach the target. your answer should not include h. (c) create an expression for the balloon's vertical position as a function of time, y(t), in terms of t, vo, g, and Īø. (d) determine the magnitude of the balloon's initial velocity, v0, in meters per second, by eliminating t from the previous two expressions.
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The magnitude J(r) of the current density in a certain cylindrical wire is given as a function of ra...
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