(a)
The mass of Electra.
(a)
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)
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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