你见过硬币“跳舞”吗?是不是觉得很新鲜呢?那就让我慢慢讲给你听吧。
一个偶然的机会,我在活动课本上看到这个实验。因为从来不知道硬币也会“跳舞”,所以我觉得有趣极了,于是萌发了自己试试看的念头。我准备了一个空的啤酒瓶和一个一元的硬币,实验就开始了
首先,按照活动课本上的要求,我先把硬币放到水里,过了一会拿出来后,再把它放到啤酒瓶口上,然后用双手捂住啤酒瓶的上部,突然,奇迹发生了,只见硬币在瓶口跳动着,多么像在跳舞啊!
这时,一个疑问浮现在我的脑海里,硬币为什么会跳舞呢?为什么非要先放到水里后才能跳舞呢?
这个问题令我思索了好几天,我查过资料之后,终于找到了原因。原来,不沾水的硬币放在瓶口上,它与瓶口之间有一定的空隙,就不能在瓶口跳动。沾了水的硬币放到瓶口上,它能紧贴在瓶口上面,不留一点空隙。这时,用双手捂住瓶口上方,瓶子里的空气就会膨胀,将硬币顶起,就像煮开的水顶着壶盖跳动一样。
真没想到一个简单的小现象竟有这么有奥秘。
Dear Santa Claus:
Howdy!Arrive the Christmas festival soon again, did you want to" go to work" again?Would you still ride the floret deer trailer to come this time?
Can you arrive at my bed front?Do you put previous lists to line up the dry skates in the socks, like?I liked it too, putting on it many cool!
Can you arrive at the kid sister younger sister's bed front?Sing a lullaby for her at the time of she cry, coax her to enter the beautiful dream country quickly and quickly.
You can stop in the sky, to a peaceful seed?The people of now needed it too, for the sake of these the innocent peoples, letting them feel the sweet.
Santa Claus, you which the gift that come?You are how can anyone know the children demand what?
Wish you:
Happy every day!Healthy longevity!
Up a slightly-left-of-center masterpiece. The emotional impact of the beautiful, wordless summation of Carls life that opens the movie the bass note that resonates through the whole film and at least as affecting as the scene in Wall-E when he holds h own hands while watching Hello Dolly. The rest of the movie, of course, breathtaking on just about every level, especially the tactile quality of all the characters and textures and the completely realized weather effects and action scenes. With no "new" technical milestones (fur in Monsters, Inc., water in Finding Nemo, realtic camera effects in Wall- E, the design the main focus, from the hilariously stylized characters to the amazing setting of the tepui.
I know----thats a interesting trip!
A simple dcussion about Up
Pixar Animation Studios a superior about talking story at all times: Toy Story a story about deeply fraternal affection. Finding Nemo a story about a father’s introspection about h education road. The Incredibles a story about middle-aged man and wife’s life cr. Cars a story about moralities in physical education’s world by telling a star’s experiences. Ratatouille a story about a spirit that never gives up and you can realize your dream. Because of those wonderful cartoons, Pixar makes itself become an excellent symbol in cartoon sphere.
Therefore, Up worth being expected. And the truth that it’s a fantastic cartoon. To my mind, dream, commitment and responsibility the key of Up’s successful.
Children’s dreams are the easiest and the most romantic, on account of they always have deeply interest and passion for new things and strange world. But sometimes it’s difficult to realize their dreams by themselves; they usually need adults’ help. And those behaviors are not only their promes, but their commitments and responsibilities.
Russell and Carl’s relationship a key of Up. They have many differences: age, characters and background. And Up explains the relationship between adults and children by them.
Though Carl and Ellie’s love story just a few minutes, it impressive
and affecting. And it’s my favorite part in Up. Every man and wife wants to live a happy life, but true life usually makes it difficult to realize. But it doesn’t mean dream unpractical, prome untrue. Through Carl becomes unsociable and eccentric, he still remember h prome to Ellie. In my opinion, the thing which flies not the house, but a heart which brave and insts on its dream and prome.
And the adventurer, Charles a special role in Up. I think he stands for the people, who just care about their own benefit, totally forget social benefit and their roles in the society. There are so many kinds of dreams, so there are some persons make fame and wealth to be their goals. In fact, it reasonable, but it’s wrong to damage the social benefit. Th way of doing things terrible, shameful and lamentable. In the film, Charles forges sample at first, then kills many innocent men, and tries h best to get the animal, a kind of big bird. Everything he does for h own fame and wealth. The film has hit the right and wrong on the nose. In the final battle, empty-handed Charles fell down into a so deep cliff. It’s not only a punhment to him, but a satire to th kind of people.
Dream likes a check, prome likes an acceptance. Once you prome, you must try your best to make it come true for it your responsibility and duty.
水——我们的朋友 平达曾说过:“自然界的一切事物中,唯有水最珍贵。”是啊,水是我们的朋友,没有了水,就没有了我们。让我们一起与水做个好朋友吧! 水看见人们不节约用水,伤心地说:我对人类的所作所为感到不满,我为人类做了那么多的贡献,可人类总是滥用我。这样既会导致水源的'流失,又会严重影响生态环境。 在生活中,处处都要用到水。洗菜要用水,洗车要用水,洗澡要用水??,这往往会浪费很多水。其实,请把水龙头开小一点,把废水再次利用,这样我们就能与水做好朋友了。比如:洗菜水可以浇花;洗澡水可以冲马桶??这样,不仅能节约用水,还对别的事物有好处呢! 如果水能这
样一滴一滴的节约起来,虽然不是太多,但是全世界人民都这样做,怎么会没有水呢? 人们可知道,世界上有许多地方水都很少,有些人,因为喝不上水,而死去,他们说:“请他们喝酒,不如请他们喝水。”下雨天,曾是他们最快乐的日子,他们可以用雨水洗澡,还能接水,以后用。他们把水当做奇珍异宝, 每次喝水都要去很远的井里去挑,那井里的水比黄河水还浑浊,比海水还难喝。由此可见,他们是多么爱水啊!如果我们能节约用水,他们的生
活难道会这样吗? 不节约用水,不但会导致水源的流失,还会影响生态环境。 有些工厂既不节约用水,还排放污水放到河流中,这样,水不仅流失了,还会影响生态环境。
as we know , water is very important to man, we can’t live without water. the amount of water which is suitable to drink is less and less. but some people don’t care about it .they waste a lot of water in their daily life. even worse, they pour dirty water in to rivers. they throw rubbish into rivers , too. many rivers and lakes are seriously polluted.something must be done to stop the pollution. only in this way can we live happily. if we don’t save water, the last drop of water will be a tear-drop of us.
we know that despite the fact that seventy percent of the earth's surface is covered with water, only a little part of it is fresh water. yet the demand for fresh water in our daily life and in industry seems great. moreover, with the expansion of the population and development of industry, the amount of the fresh water needed will increase even rapidly. it is estimated that if such a trend continues, the fresh water on earth will be exhausted very soon. what is worse, more and more water resources are being polluted, making the water unfit to use.
in addition,we must warn the people of the importance of water and the danger we are facing.for example, in most asian societies where rice is the staple food, the water used after cleaning rice contains various nutrients for plant growth and is an excellent detergent to flush the toilet. furthermore, the intriguing idea of converting the inexhaustible sea water to fresh water supplies will be the ultimate solution.
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