Q11 · 2024 · Paper 1Simple familiar1 mark
QUESTION 11
A planet orbiting a star has an orbital radius of 6.4 × 1014 m and completes a full revolution every 1.5 Earth years. What is the mass of the star?
(A)
2.0 × 1017 kg
(B)
8.0 × 1018 kg
(C)
6.9 × 1040 kg
(D)
3.3 × 1048 kg
WORKED SOLUTION
1 markAnswer C
ANSWER
C
Worked solution
Kepler/Newton gives . With the stated radius and period, the mass is approximately kg. Option C.
Selects option C.
Worked explanation by QCE Vault; correct option verified against the QCAA answer key.