求助武大学霸狗走红!

求助学霸]长颈漏斗检查气密性···求原理!【看图1无视后两个图】想了一晚上了~A.A
原理啊,1、如果气密性良好,沿着长颈漏斗注入水,管内气体对液面的压力等于外界大气压,液面保持不变,如果漏气,管内气压应该始终等于外界大气压,水会不断注入管内,长颈漏斗内也就不会有一定的液面高度.2、如果往里吹气,气密性不好气体就会直接跑到空气中,而不是瓶内,页面也就不会上升
  如果气密性良好,沿着长颈漏斗注入水,管内气体对液面的压力等于外界大气压,液面保持不变。——抱歉木有看懂哦~求解释~谢谢。
给你举一个简单易懂的例子:比如你拿着漏斗用手指使劲堵住小口那一侧,往大口那一侧注水,液面不会下降;如果你不堵着,下面放块纱布,液面肯定就不能那么呆着,肯定会下降。同理,气密性好,就像是用手堵住了,当然液面不变
这回能理解了吗?
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方法1:利用的是压强原理。橡胶管用夹子夹住,不漏气,那么瓶内的压强与长颈漏斗上空的空气压强不相同,故而有压差变化,形成水柱,若漏气,那么说明瓶内压差与长颈漏斗上的压差相等,就不会有水柱。方法二:也是类似的意思,也是利用的压差变化的原理为什么瓶内的压强与长颈漏斗上空的空气压强不相同哇WOW?求解!【我这个人理解不太好~麻烦了!】你这是初三吧,我记得初二还是初三已经学物理的压强了啊...
你这是初三吧,我记得初二还是初三已经学物理的压强了啊,这个不难理解。你就想针管,应该玩过针管吧,把针管头堵住,针管那个塞子就不容易压下来,是一样的道理。瓶内的空气不流通,压强就一直是那么多,而长颈漏斗上面的空气是流通的,也就是大气压强,与瓶内的不相同。(哪有不会要说出来,可能我的表达不是很清楚,不过我会尽量解答的)
扫描下载二维码英语翻译题,求助学霸!注意用定从_百度知道
英语翻译题,求助学霸!注意用定从
提问者采纳
(1)The bird may have disappeared.(2)I found my w憨沪封疚莩狡凤挟脯锚atch was stolen on the bus.(3)1.The idea is worth considering.
2.This idea is worth considering.
3.This idea is worthy of consideration.
4.This idea is well worth considering.(4)Where they can see many famous artists.(5)。。。。。。。。。。。。。。。。。。。。。(6)you can buy what you want at a reasonable price.
提问者评价
太给力了,你的回答完美地解决了我的问题,非常感谢!
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The bird may has disappeared.
I had my watch stolen on the bus.
The idea is worth considering.
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This bird has disappeares.I found my watch stolen on the bus.The idea is worth considering./ The idea is wothy to be considered./&The idea deserves consideration./ The idea deserves to be considered.They went to the museum where they can see many works of famous artists.正确Taobao is a website where you can buy something you need at reasonable prices.
1) This species of ird probably had dispeared.2) I found my watch was stolen on the bus.3)a. This idea is worth thinking.b. This is a worthwhile idea.c. This idea is worthy of consideration.d. This idea deserves the consideration.4) They went to that musuem where it has numbers of paintings of famous artists.5) He is such a man who is active and enthusiastic.6) Taobao is a website where you are able to buy what you want in reasonable prices.
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我有更好的答案
6和9最小公倍数为18 这个两位数最小为18, 18*5=90 所以这个两位数做大为901799
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