Four hypothetical planets P, Q, R and S revolve around the Sun with semi-major axes…

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

Four hypothetical planets P, Q, R and S revolve around the Sun with semi-major axes of 1 AU, 4 AU, 9 AU and 16 AU respectively. Which sequence gives their orbital periods in ascending order? (a) Q < P < R < S (b) P < R < Q < S (c) P < Q < R < S (d) S < R < Q < P

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