Week 16-17 Application of DE of Order One en 1ab10 16 30 10 noi Name: Section: 3. At 1:00 P.M., a thermometer reading 70 °F is taken where the air temperature is -10 °F (ten below zero). At 1:02 P.M., the thermometer is taken back indoors, where the air is at 70 °F. What is the temperature reading at 1:09 P.M.? A 4. Radium decomposes in air at the rate proportional to the amount present It is found out that in 25years, 1.1% of a certain amount decomposed. Determine approximately how long will it take: a. b. C. For one-half of the original amount to decompose? 20% of the amount to decompose What percent of the amount will decompose in 50 years? Week 16-17 Application of DE of Order One 90 Name: Section: Problem Set 16 Solve for the following: 1. A thermometer reading 18° F is brought into a room where the temperature is 70°F; 1 minute later the thermometer reading is 31°F. Determine the temperature reading as a function of time and find the temperature reading 5 minutes after the thermometer is first brought into the room. Ans: 58°F 2. At 9:00AM, a thermometer reading 70° F is taken outdoors, where the temperature is 15° F. At the 9:05 A.M., the thermometer reading is 45° F. At 9:10 A.M., the thermometer is taken back indoors, where the temperature us fixed at 70 °F. Find (a) the reading at 9:20 A.M. and (b) when the reading, to the nearest degree, will show the correct (70° F) indoor temperature.
Week 16-17 Application of DE of Order One en 1ab10 16 30 10 noi Name: Section: 3. At 1:00 P.M., a thermometer reading 70 °F is taken where the air temperature is -10 °F (ten below zero). At 1:02 P.M., the thermometer is taken back indoors, where the air is at 70 °F. What is the temperature reading at 1:09 P.M.? A 4. Radium decomposes in air at the rate proportional to the amount present It is found out that in 25years, 1.1% of a certain amount decomposed. Determine approximately how long will it take: a. b. C. For one-half of the original amount to decompose? 20% of the amount to decompose What percent of the amount will decompose in 50 years? Week 16-17 Application of DE of Order One 90 Name: Section: Problem Set 16 Solve for the following: 1. A thermometer reading 18° F is brought into a room where the temperature is 70°F; 1 minute later the thermometer reading is 31°F. Determine the temperature reading as a function of time and find the temperature reading 5 minutes after the thermometer is first brought into the room. Ans: 58°F 2. At 9:00AM, a thermometer reading 70° F is taken outdoors, where the temperature is 15° F. At the 9:05 A.M., the thermometer reading is 45° F. At 9:10 A.M., the thermometer is taken back indoors, where the temperature us fixed at 70 °F. Find (a) the reading at 9:20 A.M. and (b) when the reading, to the nearest degree, will show the correct (70° F) indoor temperature.
Engineering Fundamentals: An Introduction to Engineering (MindTap Course List)
5th Edition
ISBN:9781305084766
Author:Saeed Moaveni
Publisher:Saeed Moaveni
Chapter11: Temperature And Temperature- Related Variables In Engineering
Section: Chapter Questions
Problem 7P
Related questions
Question
Transcribed Image Text:Week 16-17 Application of DE of Order One en 1ab10 16 30 10 noi
Name:
Section:
3. At 1:00 P.M., a thermometer reading 70 °F is taken where the air temperature
is -10 °F (ten below zero). At 1:02 P.M., the thermometer is taken back indoors,
where the air is at 70 °F. What is the temperature reading at 1:09 P.M.?
A
4. Radium decomposes in air at the rate proportional to the amount present
It is found out that in 25years, 1.1% of a certain amount decomposed.
Determine approximately how long will it take:
a.
b.
C.
For one-half of the original amount to decompose?
20% of the amount to decompose
What percent of the amount will decompose in 50 years?
Transcribed Image Text:Week 16-17 Application of DE of Order One 90
Name:
Section:
Problem Set 16
Solve for the following:
1. A thermometer reading 18° F is brought into a room where the temperature is
70°F; 1 minute later the thermometer reading is 31°F. Determine the
temperature reading as a function of time and find the temperature reading 5
minutes after the thermometer is first brought into the room.
Ans: 58°F
2. At 9:00AM, a thermometer reading 70° F is taken outdoors, where the
temperature is 15° F. At the 9:05 A.M., the thermometer reading is 45° F. At 9:10
A.M., the thermometer is taken back indoors, where the temperature us fixed at 70
°F. Find (a) the reading at 9:20 A.M. and (b) when the reading, to the nearest
degree, will show the correct (70° F) indoor temperature.
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 2 steps with 4 images
Recommended textbooks for you
Engineering Fundamentals: An Introduction to Engi…
Civil Engineering
ISBN:
9781305084766
Author:
Saeed Moaveni
Publisher:
Cengage Learning
Solid Waste Engineering
Civil Engineering
ISBN:
9781305635203
Author:
Worrell, William A.
Publisher:
Cengage Learning,
Engineering Fundamentals: An Introduction to Engi…
Civil Engineering
ISBN:
9781305084766
Author:
Saeed Moaveni
Publisher:
Cengage Learning
Solid Waste Engineering
Civil Engineering
ISBN:
9781305635203
Author:
Worrell, William A.
Publisher:
Cengage Learning,
Construction Materials, Methods and Techniques (M…
Civil Engineering
ISBN:
9781305086272
Author:
William P. Spence, Eva Kultermann
Publisher:
Cengage Learning
Residential Construction Academy: House Wiring (M…
Civil Engineering
ISBN:
9781285852225
Author:
Gregory W Fletcher
Publisher:
Cengage Learning