题目内容
If an item floats on water it has ------------------- density than water.
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What is the SI unit of pressure?
Pressure is the ratio of ------ to ---------- .
The specific gravity of a fluid, designated as SG, is defined as the ratio of the density of the fluid to the density of water at some specified temperature. And SG has a unit of
The specific weight of a fluid, designated by the Greek symbol γ (gamma), is defined as its weight per unit volume. Thus, specific weight is related to density through the equation
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