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13 January, 15:05

the temperature of a liquid in an experiment starts a 0 degrees celsius. the experiment calls for the temperature of liquid to change at a rate of - 0.8 degrees celsius per minute. How long will it take for the liquid to reach - 10.8 degrees celsius? Estimate to show that your answer is reasonable.

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  1. 13 January, 15:35
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    It will take 13.5 minutes for the liquid to reach - 10.8°C.

    Step-by-step explanation:

    The initial temperature of the experiment is 0°C and as the experiment goes on, the temperature of the liquid is changing at a rate of - 0.8°C per minute.

    So, the equation that models the situation is

    T = 0 - 0.8t

    ⇒ T = - 0.8t ... (1)

    Where T is the temperature of the liquid in °C and t is the time of spending after the experiment starts in minutes.

    Now, given T = - 10.8°C and we have to find the corresponding time (t) in minutes.

    So, from equation (1) we get,

    - 10.8 = - 0.8t

    ⇒ t = 13.5 minutes

    Therefore, it will take 13.5 minutes for the liquid to reach - 10.8°C. (Answer)
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