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The mass of the proton, the nucleus of the hydrogen atom, exceeds the mass of the electron by approximately what factor?
Q15: Which of the following sequences of electromagnetic
Q70: The solar system formed about how long
Q74: The effect of the gravitational force only
Q102: What is thought to be the physical
Q128: Who first showed that light does NOT
Q131: Galileo's early observations of the sky with
Q143: Which of the following types of telescopes
Q147: The MAIN reason for building large optical
Q182: If all stars are considered to be
Q190: The internal structure of Earth is a:<br>A)