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Q1: A certain object emits infrared waves. If
Q6: When a twirling ice skater brings her
Q8: A wave oscillates up and down two
Q23: When a car is struck by lightning,
Q31: The ratio of the energy of a
Q52: After a capacitor is fully charged, the
Q55: Which force field can accelerate an electron,
Q56: When a light beam emerges from water
Q59: Astronomers can tell whether a star is
Q86: Present-day research in nuclear fusion uses<br>A) laser