Why are sound waves not polarizable?
a. Because they are not electromagnetic.
b. They are not transverse.
c. They are not longitudinal.
d. But this is readily possible!
b
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The Bohr model pictures a hydrogen atom in its ground state as a proton and an electron separated by the distance a0 = 0.529 × 10^-10 m. The electric potential created by the electron at the position of the proton is
a. -13.6 V. b. +13.6 V. c. -27.2 V. d. +27.2 V. e. +5.12 × 10^9 V.
The rigid object shown is rotated about an axis perpendicular to the paper and through point P. The total kinetic energy of the object as it rotates is equal to 1.4 J. If M = 1.3 kg and L = 0.50 m, what is the angular velocity of the object? Neglect the mass of the connecting rods and treat the masses as particles.
A. 1.3 rad/s B. 1.5 rad/s C. 1.7 rad/s D. 1.2 rad/s E. 2.1 rad/s
Two lamps, a thick-filament one and a thin-filament one, are connected in parallel to a battery. The current is greater in the lamp with the
A) thick filament. B) thin filament. C) same in each
All the following types of objects are found almost exclusively in the disk (rather than the halo) of the Milky Way except
A) young stars. B) globular clusters. C) X-ray binaries. D) high-mass, red supergiant stars.