Recent content by xmonsterx

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    How Much Does Cooling Cost on a Hot Day with a 5-Ton AC?

    ok so... delta Q = (909kg) * (333.55) = 3.0*10^5 so then do i plug this number in this equation --> COP= Q_L / W --> COP = Q_L / Q_H -Q_L ?? am i on the correct path??
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    How Much Does Cooling Cost on a Hot Day with a 5-Ton AC?

    wait.. heat of fusion which is Lf = mL = 333.55 ... how does this help me solve for the answer? what if i use deltaQ = mCdeltaT ? delta Q = 909kg * 1cal/g C * ((40+273)-(20+273)) ?? does this look right? or am i totally off?
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    Answer: Solving Three Step Gas Cycle Homework Problem

    thanks for point that out! i fixed it! now its a three step cycle. But i still don't know how to figure this problem out! please help anyone! pleaseeeeeeeeee!
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    How Much Does Cooling Cost on a Hot Day with a 5-Ton AC?

    i don't know what formula to use to find how much heat is removed in an hour. I need additional help/ hints. thanks
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    Answer: Solving Three Step Gas Cycle Homework Problem

    Homework Statement A monatomic ideal gas has pressure p_1 and temperature T_1. It is contained in a cylinder of volume V_1 with a movable piston, so that it can do work on the outside world. Consider the following three-step transformation of the gas: 1. The gas is heated at constant volume...
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    How Much Does Cooling Cost on a Hot Day with a 5-Ton AC?

    Homework Statement PROBLEM: Refrigeration units can be rated in "tons". A 1-ton air conditioning system can remove sufficient energy to freeze 1 British ton (2000pounds) = 909 kg) of 0 degree C water into 0 degree C ice in one 24-h day. QUESTION: If, on a 40 degree C day, the interior...
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    Finding Heat and Work in a Three-Step Gas Cycle

    im working on the same problem now but I am still a little confused. so what is the answer to part a,b,c. part a = 3/2(Ap1-p1)V1 ? part b = ?? part c = ?? im so lost! can anyone please help me? thanks a bunch!
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    Calculating Heat Loss and Temperature Drop Using Stefan-Boltzmann's Law

    im still confused. =( so what is the formula to figure out the temperature drop after 30mins? and are we suppose to use derivative to solve this problem? I am so sorry to bother you about this but I am really lost. are we suppose to use this equation? ---> H = E/T if so... what is H? E? T...
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    Calculating Heat Loss and Temperature Drop Using Stefan-Boltzmann's Law

    hey I am working on the same problem too and i am stuck on part b and i don't know how to even approach this problem. did u figure it out yet?
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    Magnitude of temperature change?

    BUMP! please i need this
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    Magnitude of temperature change?

    Homework Statement A kid places a bottle of soda in a fridge and let's the temperature drop to 16K. What is the magnitude of its temperature change [Delta]T = 16 K in degrees Celsius? Homework Equations T=275K + deg cel The Attempt at a Solution 16-273 = -257 degree Celsius...