Answer :
Final answer:
The beam balance and spring balance give the same measure of a given body on the surface of the Moon because the strength of gravity is relatively the same on the Moon and Earth.
Explanation:
Gravity is the force that causes an object to have weight. On Earth, gravity exerts a force on objects, causing them to be pulled towards the center of the planet. Similarly, on the Moon, gravity also exerts a force on objects, but it is much weaker compared to Earth.
Both the beam balance and spring balance measure weight by determining the force of gravity acting on the object. Since the strength of gravity is relatively the same on the surface of the Moon and Earth, both balances would give the same measure for a given body on the Moon.
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