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Q17: During the first reaction of the proton-proton
Q28: A major process in modifying Earth's crust
Q39: Which of the following is the oldest
Q39: The _ is the amount of energy
Q50: Optical telescopes are intended for the study
Q55: Which is a unique characteristic of Neptune's
Q60: How did Newton's Principia impact science?
Q71: Which form of electromagnetic radiation is able
Q71: When the Sun generates its own energy,
Q72: What is the function of the receiver