A-LevelPhysicsForces, density and pressure9702/12 · May/June 2011 · Q211 Mark
Two solid substances P and Q have atoms of mass M_P and M_Q respectively. They have n_P and n_Q atoms per unit volume. The density of P is greater than the density of Q. What must be correct?
AM_P > M_Q
Bn_P > n_Q
CM_P n_P > M_Q n_Q
DM_P / n_P > M_Q / n_Q
✓ Correct answer
C: M_P n_P > M_Q n_Q
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