1 A&Acapture 2014-12-29 2 answer 2014-11-14 3 Robot suit fight 9(finale) 2014-10-08 4 robot arm 2014-09-25 5 Teacher! 2014-08-28 6 Robot Suit Fight 8 2014-08-21 7 Robot suit fight 7 2014-08-06 8 Robot suit fight 6 2014-07-30 9 Robot suit fight 5 2014-07-23 10 robot suit 4 2014-07-14 1 2 3 4 5 6 7 8 9 10 [다음10개]   회 원 김찬호 작성일 2012-09-26 Weather    Feeling  Pleasure 제 목 Science(3) 내 용 Today I'm going to talk about dry ice and gas hydrate. Dry ice is very dangerous. It is because that -78.5 dgree Celsius. Most of the usual ices are 0 dgree Celsius. So If you touch it with no glove, it will stick to your hand, or maybe, you have to cut out your hand. Now what made dry ice? Do you know? It is called CO2 It is also known as carbon dioxide. Most of the ices all are froze by water, or liquid. But this is different. With lots of pressure and low temperature, it will be possible. Gas hydrate is simmlar. Lots of pressures are need. So I think it is difficult to make. In 1 atmospheric pressure, dry ice is gas or solid. But in 5.11 atmospheric pressure, It turn in to liquid. But the thing is that if the atmospheric pressure become too high, it is almost same power as BOMB. So we have to becareful. Now it's time for the gas hydrate. It is kind of new energy. natural gas, and oil is decreasing. So this gas hydrate is very important. It is made of LPG gas and water. image view 답변자 tc0073 답변일 2012-09-27 답변내용 Today I'm going to talk about dry ice and gas hydrate. >>Good sentence! Dry ice is very dangerous. >>Good sentence! It is because that -78.5 dgree Celsius. >>It is because it sublimates at -78.5 dgree Celsius. (incomplete thought) Most of the usual ices are 0 dgree Celsius. So If you touch it with no glove, it will stick to your hand, or maybe, you have to cut out your hand. >>Most of the usual ices are 0 dgree Celsius so if you touch it with no glove, it will stick to your hand, or maybe, you have to cut out your hand. (sentence construction) Now what made dry ice? >>Now what is dry ice made up of? (intended message) Do you know? >>Good sentence! It is called CO2. >>Good sentence! It is also known as carbon dioxide. >>Good sentence! Most of the ices all are froze by water, or liquid. But this is different. >>Most of the ices are frozen water or liquid ,but this is different. (intended message / sentence construction) With lots of pressure and low temperature, it will be possible. >>Good sentence! Gas hydrate is simmlar. >>Gas hydrate is similar. (spelling) Lots of pressures are need. So I think it is difficult to make. >>Lots of pressures are needed so I think it is difficult to make. (sentence construction) In 1 atmospheric pressure, dry ice is gas or solid. But in 5.11 atmospheric pressure, It turn in to liquid. But the thing is that if the atmospheric pressure become too high, it is almost same power as BOMB. So we have to becareful. >>In 1 atmospheric pressure, dry ice turns into gas or solid but in 5.11 atmospheric pressure, It turns in to liquid ,but the thing is if the atmospheric pressure becomes too high, it is almost as powerful as a bomb so we have to becareful. (sentence construction / subject-verb agreement) Now it's time for the gas hydrate. >>Good sentence! It is kind of new energy. >>It is a kind of new energy. (lack of article) natural gas, and oil is decreasing. So this gas hydrate is very important. >>Natural gas and oil are decreasing so this gas hydrate is very important. (capitalization / sentence construction) It is made of LPG gas and water. >>Good sentence! Thanks for writing! I hope next time you would write about yourself.