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15 March, 10:01

In a lab a substance was cooled by 42C over a 7 hours at a constant rate. What was the change in temperature each hour?

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  1. 15 March, 10:25
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    The rate of change is - 6c per hour.

    42c/7=6.

    I believe the rate of change is negative because the question states that the temperature is decreasing.
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