The central bulge and the galactic disk of the Milky Way are often referred to as its spherical component
a. True
b. False
Indicate whether the statement is true or false
False
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Spicules are:
A) atoms with the same number of protons but different number of neutrons. B) rapidly moving atoms and ions that escape from the solar corona and blow outward through the Solar System. C) chromosphere flashes that are viewed as thin pink lines above the photosphere. D) flamelike jets of gas extending upward into the chromosphere and lasting 5 to 15 minutes.
The wobble of Earth's rotational axis resulting in a change in location of the north celestial pole is called ________.
A. the Coriolis effect B. differentiation C. revolution D. deflection E. precession
As a guide, prepare a similar table showing the order of magnitudes of the thermal resistances of a unit area for convection between a surface and various fluids.
GIVEN • The order of magnitude of convective heat transfer coefficient ( h c) FIND • The order of magnitudes of the thermal resistance of a unit area (A Rc) SOLUTION The thermal resistance for convection is defined by Equation as
Matter belonging to the Galaxy can be traced out to ________ from the center
A) 5 kpc B) 8 kpc C) 15 kpc D) 50 kpc E) 200 kpc