Ad phones 1: it doesn't exactly make sense because it says the lamps will produce heat per hour OVER 2 square meters, it says for the first question, what will the temperature Be in 15 mins? The lamps will produce 4500 jouls per every 15 mins covering only 0.5 square meters. The 0.5 square metres would have gained temperature, but the other space would not have changed, how do we figure this out? Explanation: 3000x6=18000 18000 divided by 4= 4500. The space the heat takes up is 0.5m squared because 4 divided by 2 = 0.5. Overall it is impossible to solve the problem.
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It also doesn't tell you how much space the water takes up.
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And the water would fill the whole room in 2 mins roughly because the room has a volume of 72L and the water falls at 30L per min.
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Anyway in 15 mins I think the temperature would be 24.2The heats lamps only cover 4m squared and the water would overlap that space. The water will be 2c because once the water fills the room, the heat will not rise. The water is 2 degrees Celsius and on abut 2 mins it fills the whole room, after that the period of time left over will not affect the temperature. Pretty logical to me.
Last edited by ehon; Mar 26, 2014 at 06:59 AM.
Reason: <24 hour edit/bump