Rajnish Kaushik Posted January 7, 2014 Posted January 7, 2014 i have tried putting a cube of ice in water and one in air and found that ice melts faster and the same with the dry ice so i am confused about it can someone help me?
Moontanman Posted January 7, 2014 Posted January 7, 2014 (edited) i have tried putting a cube of ice in water and one in air and found that ice melts faster and the same with the dry ice so i am confused about it can someone help me? Stick your hand in room temp water, how does it feel compared to the air in the room? Edited January 7, 2014 by Moontanman
Rajnish Kaushik Posted January 7, 2014 Author Posted January 7, 2014 water is colder then the air but how does that gives me the answer ?
Moontanman Posted January 7, 2014 Posted January 7, 2014 water is colder then the air but how does that gives me the answer ? Give it some thought, why does the water feel colder?
Rajnish Kaushik Posted January 7, 2014 Author Posted January 7, 2014 Give it some thought, why does the water feel colder? because it is at lower temp then air
Moontanman Posted January 7, 2014 Posted January 7, 2014 because it is at lower temp then air No, both should have been the same temp...
Rajnish Kaushik Posted January 7, 2014 Author Posted January 7, 2014 No, both should have been the same temp... bro that was fridge water
Moontanman Posted January 7, 2014 Posted January 7, 2014 Think about why water cooling is better to keep an engine at a specific temp than air cooling...
Rajnish Kaushik Posted January 7, 2014 Author Posted January 7, 2014 Think about why water cooling is better to keep an engine at a specific temp than air cooling... bro but my question was about the ice and dry ice
Moontanman Posted January 7, 2014 Posted January 7, 2014 bro but my question was about the ice and dry ice The principle is the same...
Rajnish Kaushik Posted January 7, 2014 Author Posted January 7, 2014 The principle is the same... but how?? i m unable to understand
hypervalent_iodine Posted January 7, 2014 Posted January 7, 2014 bro but my question was about the ice and dry ice ! Moderator Note Could you please stop calling people bro? It's not really against the rules, but damn is it annoying.
Rajnish Kaushik Posted January 7, 2014 Author Posted January 7, 2014 ! Moderator Note Could you please stop calling people bro? It's not really against the rules, but damn is it annoying. but they didnt have any problem and if they then they can say me directly
Moontanman Posted January 7, 2014 Posted January 7, 2014 It's an out dated American idiom, he trying to curry favor,
Rajnish Kaushik Posted January 7, 2014 Author Posted January 7, 2014 It's an out dated American idiom, he trying to curry favor, lol
Elite Engineer Posted January 7, 2014 Posted January 7, 2014 There is a better transfer of energy from the warm water to the cold ice cube than there is from the warm air to the cold ice cube.
Moontanman Posted January 7, 2014 Posted January 7, 2014 There is a better transfer of energy from the warm water to the cold ice cube than there is from the warm air to the cold ice cube. Don't do it for him...
Rajnish Kaushik Posted January 7, 2014 Author Posted January 7, 2014 There is a better transfer of energy from the warm water to the cold ice cube than there is from the warm air to the cold ice cube. what if water is coller but still ice melt faster
John Cuthber Posted January 7, 2014 Posted January 7, 2014 Water feels colder than air. Why? How warm is your hand? How warm is an ice cube? (and, for the record, please don't call me bro).
Elite Engineer Posted January 7, 2014 Posted January 7, 2014 Don't do it for him... haha, sorry I was getting frustrated. I think Rajnish may be a troll
Sensei Posted January 7, 2014 Posted January 7, 2014 (edited) i have tried putting a cube of ice in water and one in air and found that ice melts faster and the same with the dry ice so i am confused about it can someone help me? 1 cm^3 of air has ~2.68*10^19 molecules at 0 C, s.p. 1 cm^3 of water has ~3.345*10^22 molecules of H2O. Collisions between cold object molecules and water molecules are more probable than collisions with rare oxygen & nitrogen molecules. In thermic cups and thermoses there is even used layer of vacuum, to separate hot/cold content from environment. Edited January 7, 2014 by Sensei
Lightmeow Posted January 7, 2014 Posted January 7, 2014 Think of it this way. When you melt an ice cube, what is happining. Do you think water might have any properties that make it easyier for the ice to melt in it then in air.
swansont Posted January 7, 2014 Posted January 7, 2014 The relevant parameters are the heat capacity, the mass and the temperature. Q = mC [math]\Delta T[/math] m is the mass, C is the specific heat The water may have a smaller temperature difference, but there's a lot more of it, and water has the ability to absorb more heat per unit mass for a given temperature increase. For the record, I also find it annoying being referred to as Bromine Oxide. 1
Rajnish Kaushik Posted January 7, 2014 Author Posted January 7, 2014 haha, sorry I was getting frustrated. I think Rajnish may be a troll bro what problem u have with me ?
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