Recent content by chetanladha

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    Monitoring internal corrosion of a pipeline

    Hi All, I am wondering if there is any way to monitor internal corrosion in pipelines (without using pigs and interrupting the flow)? May be ultrasound waves could be used for this purpose, however I am not sure if it would be able to give a clear picture of extent of corrosion. Thanks...
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    Undergrad Property of Natural Log- Inequality equation

    Thanks a lot..!
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    Undergrad Property of Natural Log- Inequality equation

    Thanks for response. Yes its smaller or equal (Sorry couldn't rite it..).. Is plotting the function f(x) = [x/(1+x)] - ln (1 + x) best way 2 prove it??
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    Undergrad Property of Natural Log- Inequality equation

    Hi. I just saw on wikipedia that natural logarithm has such a property: [x/(1+x)] < ln (1 + x) < x (http://en.wikipedia.org/wiki/Natural_logarithm) Can anyone pls tell me how to prove this? Proving [x/(1+x)] and ln (1 + x) less than 'x' is easy.. But how abt [x/(1+x)] < ln (1 + x)...
    • chetanladha
    • Thread
    • Inequality Log Natural Natural log Property
    • Replies: 5
    • Forum: Calculus
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    Let's Talk About Energy Sources

    Use of solar power to produce hydrogen.. The tech is already in place (in Canada), but is xpensive.. But i stroingly believe it'll take over in near future..
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    Can supercharging of an engine ever lead to reduced power?

    Sorry i forgot 2 mention THANKS FOR UR RESPONSE..
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    Can supercharging of an engine ever lead to reduced power?

    constant volume process. ratio of t3 to t2 = ratio of p3 to p2 p2 increases = t3 decreases t4 is a function of t3..
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    Can supercharging of an engine ever lead to reduced power?

    Hi, I have decided to increase inlet T and P of a typical diesel engine (operatiing on dual air standard cycle). THeoretically if all other parameters r same, I have observed that t2 (temp at the end of compression) and p2 increases, but t3 (temp at the end of constant volume heating) and...
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    Undergrad Calculating Heat Loss via Radiation Transfer

    Hey.. Sorry but 1 more small q. I calculated the heat flux from sun on my plate to be around 51kW. (assuming solar intensity 1000kW/m2). The stephen law gives me heat lost to the surroundings in order of 72kW (using constant value of emissivity). Apart of not using constant value of...
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    Undergrad Calculating Heat Loss via Radiation Transfer

    Thanks a lot. It was really helpful.
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    Undergrad Calculating Heat Loss via Radiation Transfer

    That was a good description. I am giving the value of emmissivity in Stefan's law, so i guess that shouldn't be a problem. I am calculating the radiation heat loss from a steel plate in open atmosphere clear sky. So, now what should i take the temperature of sky as?
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    Undergrad Calculating Heat Loss via Radiation Transfer

    Hi. I want to calculate the heat which will be lost from a body at temperature 't' to the atmosphere through radiation heat transfer. I can use Stephen's Boltzmann equation, but what should i take the temperature of surroundings as? Should it be the temperature of air or space? Thanks.
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    At what temperature range can brittle fracture be expected in low carbon steels?

    Hmm.. Makes real sense. Let me re-frame my question. I want to study the effects of low temperature (0-5 C) on a ship structure, which is made using low carbon steel. (Steel Grades commonly used AH36, DH36 & EH36) Can you please help? Thanks..!
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    At what temperature range can brittle fracture be expected in low carbon steels?

    Its certainly higher for low carbon steels. Liberty ships sank because of brittle fracture, and temperature was about 0-5 C.
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    At what temperature range can brittle fracture be expected in low carbon steels?

    Hi. At what temperature range can brittle fracture be expected in low carbon steels? Are there other parameters which govern its occurrence? Thanks.