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A torque balance can be used to measure an unknown:

AHeat
BCharge
CSpeed
DMass
Answer & Solution
Correct answer: D. Mass
1. The balance compares turning effects, not weights directly. 2. Local gravity cancels from both sides. 3. So it measures mass. _Source: OpenStax University Physics Volume 1, Chapter 12, Static Equilibrium and Elasticity._
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