A liquid of density \( 600 \, \text{kg} \, \text{m}^{-3} \) flowing steadily in a tube of varying cross-section. The cross-section at a point A is \( 1.0 \, \text{cm}^2 \) and that at B is \( 20 \, \text{mm}^2 \). Both the points A and B are in same horizontal plane, the speed of the liquid at A is \( 10 \, \text{cm} \, \text{s}^{-1} \). The difference in pressures at A and B points is ______ \( \text{Pa} \).
