Question

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?

Answer 1

The substance cooled down by 6°C each hour over the 7-hour period.

Step-by-step explanation:

To find the change in temperature each hour when a substance was cooled by 42°C over a 7-hour period at a constant rate, you would divide the total temperature change by the number of hours.

Change in temperature per hour = Total temperature change ÷ Number of hours

Change in temperature per hour = 42°C ÷ 7 hours

Change in temperature per hour = 6°C per hour

Therefore, the substance cooled down by 6°C every hour over the 7-hour period.

Answer 2

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.