When a light wave enters into a medium of different refractive index,
A) its speed, frequency, and wavelength change. B) only its speed and frequency change.
C) only its speed and wavelength change. D) only its frequency and wavelength change.
C
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Seawater has a density of 1,025 
at the surface. The bulk modulus of seawater is 
What is the density of seawater at a depth of 10.00 km?
A. 1074 
B. 1230
C. 1574
D. 1764
E. 1973
Which diagram(s) represent(s) a latitude at which the Sun sometimes passes directly overhead?
What will be an ideal response?
A photon absorbed by an electron will give up more energy to the electron if the photon:
a. is not spread out over many electrons. b. is moving faster. c. is moving slower. d. has a higher frequency.
Which of the two identical pyramids is exerting the most pressure on the floor?
1) A 2) B 3) both the same The reason for this is that 4) they both have the same weight. 5) the heaviest part of the pyramid is closer to the floor. 6) the weight is distributed over a smaller area. 7) the weight is distributed over a larger area.