The direction of the magnetic field of a bar magnet is
a. in the direction opposite to that in which a compass would point.
b. in any direction.
c. away from the south pole.
d. away from the north pole.
d
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A neutron star must have a mass greater than 2.4 solar masses
a. True b. False Indicate whether the statement is true or false
Which of the following best defines the sampling rate?
A. The number of samples obtained per second during the recording process. B. The bit depth of an audio file. C. The amount of background noise in an audio file. D. The speed of playback of an audio file.
The maximum distance that the particles of a wave's medium vibrate from their rest position:
a) Frequency b) Wavelength c) Wave Speed d) Amplitude
As evidence for the cosmic inflation hypothesis, this hypothesis explains
A) the observed "flatness" of the overall three-dimensional universe. B) the origin of the "clumping" of matter and energy that we see today in such aggregations as stars and galaxies. C) Both of the above. D) the force of gravity. E) All of the above.