In a science experiment, the temperature of a substance is changed from 42 degrees Fahrenheit to -54 degrees Fahrenheit at an average rate of -12 degrees per hour. Over how many hours does the change take place?
8 hrs
(42 + 54) / 12 = ________ hours
Right!
To find the number of hours it takes for the temperature change to occur, we can use the formula:
Number of hours = (Final temperature - Initial temperature) / Average rate of change
Given:
Initial temperature = 42 degrees Fahrenheit
Final temperature = -54 degrees Fahrenheit
Average rate of change = -12 degrees per hour
Substituting these values into the formula, we get:
Number of hours = (-54 - 42) / -12
= -96 / -12
= 8
Therefore, the temperature change takes place over 8 hours.