An example of magnetohydrodynamics (MHD) comes from the

Fundamentals of Physics 10
In Fig. 35-39, two isotropic point sources S1 and S2 emit light in phase at wavelength l and at the same amplitude. The sources are separated by distance 2d ! 6.00l. They lie on an axis that is parallel to an x axis, which runs along a viewing screen at distance D ! 20.0l. The origin lies on the perp

Classical Mechanics 0
Consider a particle of mass in and charge q moving in a uniform constant magnetic field B in the z direction. (a) Prove that B can be written as B= V x A with A = 413 x r. Prove equivalently that in cylindrical polar coordinates, A = 1Bp b. (b) Write the Lagrangian (7.103) in cylindrical polar coordi

Physics: Principles with Applications 6
To get a flat, uniform cylindrical satellite spinning at the correct rate, engineers fire four tangential rockets as shown in Fig. 8-44. If the satellite has a mass of 3600 kg and a radius of 4.0 m, what is the required steady force of each rocket if the satellite is to reach 32rpm in 5.0 min?

Physics for Scientists and Engineers: A Strategic Approach, Standard Edition (Chs 1-36) 4
A mobile at the art museum has a 2.0 kg steel cat and a 4.0 kg steel dog suspended from a lightweight cable, as shown in FIGURE EX7.23. It is found that u1 = 20 when the center rope is adjusted to be perfectly horizontal. What are the tension and the angle of rope 3?

Anatomy & Physiology 1
Why are osteocytes spread out in bone tissue? a. They develop from mesenchymal cells. b. They are surrounded by osteoid. c. They travel through the capillaries. d. Formation of osteoid spreads out the osteoblasts that formed the ossification centers.

Urban Economics 8
Suppose dwelling quality is measured on a scale of 1 to 10, and the monthly cost of producing a particular quality equals the square of the quality level: For quality level 1, the cost is $1; for quality level 2, the cost is $4, and so on. The monthly rent equals the price per unit of quality (P= $9)

Advanced Engineering Mathematics 10
Find the trigonometric polynomial F(x) of the form (2) for which the square error with respect to the given f(x) on the interval \(-\pi<x<\pi\) is minimum. Compute the minimum value for \(N=1,2, \cdots, 5\) (or also for larger values if you have a CAS). \(f(x)=\left\{\begin{array}{rlr}-1 & \text {

Biology: The Unity and Diversity of Life 15
A massive die-off of lobsters in the Long Island Sound was blamed on pesticides sprayed to control mosquitoes that carry West Nile virus. Why might a chemical designed to kill insects also harm lobsters but have no effect on sea stars?