Colors appear different to us because of their photons' different:
A) speeds.
B) amplitudes.
C) frequencies.
D) magnetic fields.
E) polarization.
C
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The most important climatic factors that affect the rate of chemical weathering are heat and
a. moisture. b. wind. c. clouds. d. none of these.
Describe the location of Polaris in the sky relative to the horizon as seen by observers in Alaska (lat. = 60° N), Texas (lat. = 33° N), Ecuador (lat. = 0°), and Australia (lat. = 30° S)
What will be an ideal response?
Energy and Mass: A 1.0-kg aluminum ingot is heated from 0°C to 100°C. By what amount does its mass change? The specific heat of aluminum is 900 J/kg ? K. (c = 3.0 × 108 m/s)
A. Its mass does not change. B. Its mass increases by 0.50 × 10-12 kg C. Its mass decreases by 0.50 × 10-12 kg D. Its mass increases by 1.0 × 10-12 kg E. Its mass decreases by 1.0 × 10-12 kg
The force of gravity does work on a satellite when it is in
A) circular orbit. B) elliptical orbit. C) both of these D) neither of these