A moving electric charge or a current in a magnetic field may experience a(n) ______________
Fill in the blank(s) with correct word
force
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The technique for producing single crystals of turbine blades is by a modification of
(a) Investment casting (b) Directional solidification (c) The Bridgeman-Stockbarger technique (d) The Czochralski technique
A dam is thicker at the bottom than at the top mainly because
A) water is denser at deeper levels. B) water pressure increases with depth. C) surface tension exists only on the surface of liquids. D) it looks better. E) none of the above
How is the energy that powers radio galaxies, quasars, and other active galactic nuclei produced?
A) by matter that has been converted to pure energy by interacting with the jets shot out by a central black hole B) by nuclear fusion near a central black hole C) by matter-antimatter annihilation near a central black hole D) by magnetic fields that trap and accelerate charged particles, which then radiate large amounts of energy E) by gravity, which converts the potential energy of matter falling toward a central black hole into kinetic energy, which is then converted to thermal energy by collisions among the particles of matter
Give the Kelvin-Planck statement of the Second Law of Thermodynamics
What will be an ideal response?