Paper 1 · units and dimensions
A student used base units to check an equation and found that the left hand side of the equation was equivalent to the right hand side. Which of the following statements about the equation is correct?
AIt is homogeneous and correct.
BIt is homogeneous and not necessarily correct.
CIt is not homogeneous but is correct.
DIt is neither homogeneous nor correct.
Explanation: Dimensional consistency shows homogeneity but does not guarantee the equation is correct (dimensionless constants may be wrong).
ZIMSEC Physics Paper 1, November 2004, Q2
