character: Isaac Newton
topic: Law of Universal Gravitation
grade: 9
subject: Mathematics
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character: Galileo Galilei
topic: Influence on Newton's Laws
grade: 9
subject: Mathematics
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character: Johannes Kepler
topic: Planetary Motion and Gravity
grade: 9
subject: Mathematics
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character: Albert Einstein
topic: General Relativity and Gravity
grade: 9
subject: Mathematics
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