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Applications and ExamplesSilver cooling in air The
Chapter 7, Problem 44E(choose chapter or problem)
Problem 44E
Applications and Examples
Silver cooling in air The temperature of an ingot of silver is 60°C above room temperature right now. Twenty minutes ago, it was 70°C above room temperature. How far above room temperature will the silver be
a. 15 min from now? b. 2 hours from now?
c. When will the silver be 10°C above room temperature?
Questions & Answers
QUESTION:
Problem 44E
Applications and Examples
Silver cooling in air The temperature of an ingot of silver is 60°C above room temperature right now. Twenty minutes ago, it was 70°C above room temperature. How far above room temperature will the silver be
a. 15 min from now? b. 2 hours from now?
c. When will the silver be 10°C above room temperature?
ANSWER:
Solution
Step 1 of 5
In this problem we have to find the temperature of the silver.
Given that
The temperature of an ingot of silver is
Twenty minute ago temperature will be
We know that Newton’s law of cooling.
………….(1)