Torricelli's law

（重定向自Torricelli theorem）

Torricelli's law, also known as Torricelli's theorem, is a theorem in fluid dynamics relating the speed of fluid flowing out of an opening to the height of fluid above the opening.

Torricelli's law states that the speed of efflux, v, of a fluid through a sharp-edged hole at the bottom of a tank filled to a depth h is the same as the speed that a body (in this case a drop of water) would acquire in falling freely from a height h, i.e. $v = \sqrt{2gh}$ , where g is the acceleration due to gravity (9.81 N/kg near the surface of the earth). This last expression comes from equating the kinetic energy gained, $\frac{1}{2}mv^2$ , with the potential energy lost, mgh , and solving for v.

单词	Torricelli theorem
释义	Torricelli theorem 原声例句 Crash Course 综合篇 Now, let’s look at a special case of Bernoulli’s equation, known as Torricelli’s theorem. 现在，让我们看一下伯努利方程的一个特例，即托里拆利定理。英语百科 Torricelli's law （重定向自Torricelli theorem） Torricelli's law, also known as Torricelli's theorem, is a theorem in fluid dynamics relating the speed of fluid flowing out of an opening to the height of fluid above the opening. Torricelli's law states that the speed of efflux, v, of a fluid through a sharp-edged hole at the bottom of a tank filled to a depth h is the same as the speed that a body (in this case a drop of water) would acquire in falling freely from a height h, i.e. $v = \sqrt{2gh}$ , where g is the acceleration due to gravity (9.81 N/kg near the surface of the earth). This last expression comes from equating the kinetic energy gained, $\frac{1}{2}mv^2$ , with the potential energy lost, mgh , and solving for v.
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