A-LevelPhysicsPhysical quantities and units9702/12 · May/June 2024 · Q21 Mark
The value of quantity X has a percentage uncertainty of 2%. The value of quantity Y has a percentage uncertainty of 4%. The value of a quantity W is calculated from the values of X and Y. The value of W has a percentage uncertainty of 8%. What could be the relationship between W, X and Y?
AW = XY
BW = 2XY
CW = X/Y²
DW = Y/X²
✓ Correct answer
D: W = Y/X²
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