The "flatness" problem arises because the curvature of space seems remarkably close to:
A) zero curvature, favoring a spherical cosmos.
B) exactly one.
C) .5, suggesting we are split between open and closed universes.
D) 2.73 K, in spite of the eddies and turbulence that led to galaxy formation.
E) infinity, suggesting an open universe is the only possible cosmology.
B
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The neutrino is
a. a little neutron. b. another name for a positron. c. the particle detected in carbon dating. d. a particle proposed to account for "missing" energy and momentum in beta decay.
Solenoid: When you double the number of windings in an ideal solenoid while keeping all other parameters (radius, length and current) fixed, the magnetic field at the center of the solenoid will
A. double. B. triple. C. quadruple. D. be reduced by a factor of one-half. E. be reduced by a factor of one-fourth.
If a battleship sinks in a canal lock, the water level in the lock will
A) rise. B) fall. C) remain unchanged.
Atmospheric lifting resulting from the convergence of two different air masses is called
A) convectional lifting. B) orographic lifting. C) adiabatic lifting. D) frontal lifting.