The ____ is responsible for binding the electrons to the nucleus
a. Kirchhoff's law
b. ground state
c. temperature
d. Coulomb force
e. Balmer series
D
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The magnetic fields of Uranus and Neptune are peculiar in that they are
a. highly inclined to their planet's axis of rotation. b. very weak (virtually zero). c. produced by the solar wind. d. produced by disturbances caused by the orbits of the moons. e. all of the above.
If an object's speed is constant, its velocity must also be constant
a. True b. False Indicate whether the statement is true or false
If you double the net force on an object, you'll double its
A) acceleration. B) speed. C) velocity. D) all the above
For finding the distance to M31, Hubble relied upon
A) planetary nebulae near its core. B) Cepheid variables in its spiral arms. C) Type I supernova in its core. D) Type II supernova in its spiral arms. E) RR Lyrae stars in its globular clusters.