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Q1: Two people are balanced on a see-saw.
Q2: A variety of sunset colors is evidence
Q10: Green light emitted by excited mercury vapor
Q14: The average speed of light is greatest
Q16: Light shines on a pane of green
Q22: If light in a spectroscope were passed
Q29: As we become older, the frequency range
Q30: The primary of a transformer is the
Q49: A step-up transformer has a ratio of
Q55: The price and service trade-offs available to