At sunset, the ____ Moon phase will be highest above the southern horizon for an observer in the Northern Hemisphere
a. new
b. waxing crescent
c. first quarter
d. full
e. third quarter
c
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The melting point of aluminum is 660°C, its latent heat of fusion is 4.00 × 105 J/kg, and its specific heat is 900 J/kg ? K
If 300 kJ of thermal energy are added to 442 g of aluminum at 100°C, what is the final state of the system? That is, how much is liquid, how much is solid, and what is its temperature?
Radio telescopes have poor resolving power because:
A) they have the smallest diameters. B) they cannot measure wavelengths larger than 102 m. C) radio waves have long wavelengths. D) radio waves have small diffraction fringes.
Diffraction is the tendency of light to:
A) spread around corners. B) separate into its component colors. C) bend through a lens. D) disperse within a prism. E) reflect off a mirror.
The shortest distance between two points on a curved surface is a
A) straight line. B) geodesic. C) neither of these