In a science experiment, the temperature of a substance is changed from 42 degrees Fahrenheit to -54 at an average rate of-12 de grees Fahrenheit per hour. Over how many hours does the change take place
1 answer:
Answer:
8 hours
Step-by-step explanation:
The time required is the temperature difference divided by the rate of change of temperature:
(-54 -42)°F/(-12 °F/h) = -96/-12 h = 8 h
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