幫忙解答一個科學原理問題
回答 (2)
2007-03-25 5:17 am
✔ 最佳答案
物體既浮沉跟密度有關密度(Density)表示為單位體積的質量，是物體質量與體積的比值
密度=質量/體積
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將隻蛋擺係裝住水的杯入面
水的密度較低而隻蛋較高~蛋就會下沉
但係加d鹽係d水度
水既密度就升高~ 當水既密度升高比隻雞蛋高時 隻雞蛋就會浮起
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由此可見當一樣物質密度比其他物質較低時就會浮起~但如果較高就會下沉
2007-03-25 5:06 am
This relates to The Principle of Upthrust.
Upthrust is a force making an object to float. If the upthrust is equal or greater than the weight (mass x gravitational acceleration), the object will float. How to calculate upthrust?
Upthrust = volume of object x density of fluid x 10
You will see the density of fluid changes in your question. Adding salt (鹽) will increase the density of fluid, the upthrust increases in the case such that the egg is sink in water and float when salt is added in the water.
Upthrust is a force making an object to float. If the upthrust is equal or greater than the weight (mass x gravitational acceleration), the object will float. How to calculate upthrust?
Upthrust = volume of object x density of fluid x 10
You will see the density of fluid changes in your question. Adding salt (鹽) will increase the density of fluid, the upthrust increases in the case such that the egg is sink in water and float when salt is added in the water.
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