What is the name of the Sun's outermost solar atmosphere, which can be seen during a solar eclipse?
a. Solar wind
b. Heliosphere
c. Photosphere
d. Corona
d
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The Dynamo Theory holds that
A) lightning plays a major role in generating our magnetic fields. B) any other planet of similar density will also have a strong magnetic field. C) the Earth's core, like Mercury's, is now a solid, rigid bar magnet. D) magnetic fields are generated by rapidly spinning, fluid magnetic interiors. E) the Earth's magnetic field must switch polarities every few million years.
The sound intensity level 5.0 m from a point source is 95 dB. At what distance will it be 75 dB?
A) 225 m B) 75 m C) 25 m D) 50 m
Determine the equivalent capacitance of the combination shown when C = 12 nF
 a. 34 nF b. 17 nF c. 51 nF d. 68 nF e. 21 nF
The electron antineutrino is which of the following types of particle?
A. meson B. baryon C. hadron D. lepton E. quark