2. A thermometer reading 45°C is brought outside where the temperature is 25°C. Five minutes later the thermometer reading is 33°C. Find: A. the thermometer reading 10 minutes after the thermometer was brought outside B. the time it will take for the reading to drop to 26°C

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter1: Variables, Expressions, And Integers
Section1.5: Adding Integers
Problem 45E
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2.

2. A thermometer reading 45°C is brought outside where the temperature is 25°C. Five
minutes later the thermometer reading is 33°C. Find:
A. the thermometer reading 10 minutes after the thermometer was brought outside
B. the time it will take for the reading to drop to 26°C
Transcribed Image Text:2. A thermometer reading 45°C is brought outside where the temperature is 25°C. Five minutes later the thermometer reading is 33°C. Find: A. the thermometer reading 10 minutes after the thermometer was brought outside B. the time it will take for the reading to drop to 26°C
The differential equations corresponding to Newton's Law of Cooling are:
For a body being cooled,
dup
-k(up – Um)
— еqп. 1
dt
For a body being heated,
dup
+k(um – Up)
dt
→ egn. 2
Transcribed Image Text:The differential equations corresponding to Newton's Law of Cooling are: For a body being cooled, dup -k(up – Um) — еqп. 1 dt For a body being heated, dup +k(um – Up) dt → egn. 2
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