Which of the following equations can be used to calculate the pressure exerted by a liquid?
a. Liquid pressure = liquid depth ÷ liquid density
b. Liquid pressure = liquid depth ? surface area
c. Liquid pressure = liquid density ? liquid viscosity
d. Liquid pressure = liquid density ? liquid depth
ANS: D
The pressure exerted by a liquid depends on both its height (depth) and weight density (weight per unit volume), which is shown in equation form:
PL = h ? dw.
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