An object emits a range of electromagnetic energy wavelengths because
A. relativity theory states that objects attain varying terminal velocities.
B. lowest and highest vibration rates are cancelled.
C. all molecules vibrate at the same rate.
D. not all molecules vibrate at the same speed.
Answer: D
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Which of the following explains why thunderstorms along cold fronts are more severe than thunderstorms along warm fronts?
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Indicate whether the statement is true or false.
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