| 摘要 |
PROBLEM TO BE SOLVED: To precisely measure the surface tension of a stationary droplet by use of a basic Laplace equation. SOLUTION: A minute gravity environment as a position shifted from a mass point is utilized in a position close to the center of gravity on the orbit of the space or earth (for example, in an orbitally flying object such as spacecraft). The object to be measured consists of a stationary droplet 10 of a perfect sphere (or substantially sphere) of a stationary liquid or a metal material or semiconductor material laid in fused state. In the measurement of surface tension, a U-shaped tube manometer 20 is inserted into the stationary droplet 10 to be measured, and the osmotic pressures of the density of the droplet 10 beyond the interface and the density of the external gas are measured at once to precisely measure the surface tension by use of a basic Laplace equation.
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