| 单词 | mass density |
| 释义 | mass density To determine volumetric mass density, one must first discount the volume of the void fraction. Retrieved from Wikipedia CC BY-SA 3.0 As there are many units of mass and volume covering many different magnitudes there are a large number of units for mass density in use. Retrieved from Wikipedia CC BY-SA 3.0 We know for nonrelativistic particles that their mass density decreases proportional to the inverse volume of the universe so the equation above must be true. Retrieved from Wikipedia CC BY-SA 3.0 A hierarchical structure of matter began to form from minute variations in the mass density of space. Retrieved from Wikipedia CC BY-SA 3.0 Alternatively, two-part domes could contain a lifting gas like hydrogen or helium (extractable from the atmosphere) to allow a higher mass density. Retrieved from Wikipedia CC BY-SA 3.0 |
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