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(a)
The mass of Electra.
(a)
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Answer to Problem 38QAP
The mass of Electra is
Explanation of Solution
Write the expression for semi-major axis of moon orbit.
Here,
Write the expression for orbital period using Kepler’s third law.
Here,
Rearrange the above expression in term of
Conclusion:
Calculate the radius of asteroid.
Substitute
Substitute
Thus, the mass of Electra is
(b)
The density of Electra.
(b)
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Answer to Problem 38QAP
The density of Electra is
Explanation of Solution
Write the expression for volume of asteroid.
Here,
Write the expression for density of asteroid.
Here,
Conclusion:
Substitute
Substitute
Thus, the density of Electra is
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Chapter 9 Solutions
Understanding Our Universe
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