GK
SOLAR SYSTEM
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
Which of the following data can help someone to infer the size of a planet?
|
|
how many moons it can capture due to its pull of gravity
|
|
|
how far it is from the Sun in km
|
|
|
its surface temperature in degrees
|
|
|
its surface geography
|
Explanation:
Detailed explanation-1: -The bigger the mass, the stronger the gravity. This is direct and unavoidable. The bigger the size for a given mass, the smaller the gravity, since you are farther from the center of mass (the center of the planet).
Detailed explanation-2: -Once we have the sun’s mass, we can similarly determine the mass of any planet by astronomically determining the planet’s orbital radius and period, calculating the required centripetal force and equating this force to the force predicted by the law of universal gravitation using the sun’s mass.
There is 1 question to complete.