When a light ray meets an interface between two media, the angle of refraction is _______ the angle of incidence.
A. Always less than
B. Always greater than
C. May be greater than, equal to, or less than
D. Equal to
C. May be greater than, equal to, or less than
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At a depth of about 1030. m in the sea the pressure has increased by 100. atmospheres (to about 107 N/m2). By how much has 1 m3 of water been compressed by this pressure? The bulk modulus of water is 2.3 × 109 N/m2
What will be an ideal response?
The combination of water with small ceramic particles is a(n) ___________.
Fill in the blank(s) with the appropriate word(s).
Sgr A* is believed to be the center of the Milky Way galaxy because I. It lies in the general direction of the center of the galaxy based on observations of globular clusters in the plane of the Milky Way. II. Long wavelength dust penetrating images show it to be a region crowded with stars III. Orbits of stars around it indicate a mass several million times that of the Sun within a volume a few
light hours in size IV. Radio observations show it is a concentrated source at the center of swirling clouds of gas a. I & II only b. II & III only c. I & IV only d. II & IV only e. All of I, II, III, & IV
A positive ion is formed when
a. a neutral atom gains an electron. b. a neutral atom loses an electron. c. a negative ion loses an electron. d. all of the above