Why does hot air rise?Density:Density is an intensive property of matter. It's the ratio of mass to volume and has the units g/cm3. The densities of substances depend on what phase of matter they are in.Answer and Explanation:
Why does hot air rise? Why is water liquid at room temperature? Why is the mesosphere cold? Why is cold air more dense? Why does raising the temperature cause a liquid to boil? Why does temperature stay constant during a phase change?
百度试题 结果1 题目(How; Why y) does a balloon the air?n rise in It uses hot air 相关知识点: 试题来源: 解析 答案见上 反馈 收藏
It was a very cold day and the wind was blowing. But Li Yungang didn’t feel it. He even felt hot. After all, this 14-year-old student from Beijing Jingshan School was cutting grass for three hours. This was the first time this city boy had done any farm work. “It was not that...
Or if the weather is very cold, the tiny droplets freeze and fall down as snow, hail, or sleet.或者在天气非常寒冷的时候，空气中的小水滴就会凝固，以雪、冰雹、雨夹雪的形式落下来。So, there you go – that's what a cloud is, and how it creates rain.所以这就是云和雨的形成过程。But ...
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It expels some of the hot air via the release valve and hose. The rest goes through the unit’s conditioning mechanism until it cools to the user’s desired temperature and blows the cold air back into the room. Hot air is pulled in by the fan, ice-cold coils within the unit cool...
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四、阅读理解On a hot summer day, you find the pond has almost dried up. Where does the water go? It goes into the air! Each drop of water is made of tiny droplets(小滴). When the sun warms them,they rise and become part of the air. However, do you know how rain is formed?...
Why does hot air rise? Why does temperature remain constant for melting ice? Why does warm air rise? Why does water evaporate faster than alcohol? Why is ice the solid form of water? Why can't cold air hold much water vapor? Why is evaporation a cooling process?