Question and Answers Forum
Heat and TheromdynamicsQuestion and Answers: Page 1
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Question and Answers Forum |
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Heat and TheromdynamicsQuestion and Answers: Page 1 |
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| A wolf weighs 40 kg, how many kilo calories does it need to maintain its body temperature? |
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| what is the triple point of water? |
| A gap must be left between steel rails to allow for thermal expansion. How large a gap is needed if the maximum temperature reached is 50° above the temperature at which the rails were laid. The length of the rail is 10m and the α_(steal) =12×10^(−6) /°c |
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| Δt=210C^° k=? |
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| What will be the state of a system(isolated)when its entropy tends to zero or zero? Time get stopped?? or another things may happen I am thinking about this |
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| A student seals 200g of ice−cold water in a glass vacuum (thermos) flask and finds that it warms up by 3.5 K in one hour SHC of water =2400 Jkg^(−1) K^(−1) a) Calculate the average rate of heat flow in the flask in watts. To check this result over a longer period,the student fills the flask with equal amounts of ice and water all at 0°C, and leaves it for 4 hours. the specific latent heat(enthalpy) of fusion of ice is 0.33MJg^(−1) b) How much ice would you expect to have melted at the end of the four hours? |
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