Question

if a liquid has a free surface, how can you calculate the pressure at a certain point in the liquid? answer options: select one of four p = h/dg, p = g/hd, p = hdg, p = h = dg

Explanation:

The formula for pressure at a point in a liquid with a free surface (hydrostatic pressure) is derived from the weight of the liquid column above the point. The pressure \( p \) is given by \( p = hdg \), where \( h \) is the depth of the point from the free surface, \( d \) (or \(
ho \) for density) is the density of the liquid, and \( g \) is the acceleration due to gravity. The other options have incorrect arrangements of the variables.

Answer:

C. \( p = hdg \) (assuming the third option is labeled C; if the original options had labels like A, B, C, D with the third being \( p = hdg \), then the answer is the option with \( p = hdg \))