This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: The R-value of an insulating material is the thickness of the material divided by its thermal ... (Read 62 times)

elizabeth18

  • Hero Member
  • *****
  • Posts: 559
on: Aug 6, 2020

Question 1

The R value of fiberglass batting, 3.5 inches thick, is 11 ft2⋅°F⋅h/BTU. What is the thermal conductivity (in BTU/ft⋅°F⋅s)?

◦
7.4 × 10−6

◦
2.7 × 10−2

◦
8.9 × 10−5

◦
1.4 × 10−4

◦
3.6 × 10−3


Question 2

The R-value of an insulating material is the thickness of the material divided by its thermal conductivity. When an insulating material consists of three layers with R-values R1, R2 and R3, the overall R-value of the insulation is given by

◦
R = R1 + R2 + R3.

◦
.

◦
.

◦
.

◦
.
Physics for Scientists and Engineers ¦ Serway, Jewett ¦ 9th Edition
Buy Test-Bank


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by elizabeth18 on Aug 6, 2020

shewald78

  • Sr. Member
  • ****
  • Posts: 340
Reply #1 on: Aug 6, 2020
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
Answer Preview
Only 29% of students answer this correctly


elizabeth18

  • Member
  • Posts: 559
Reply 2 on: Aug 6, 2020
Excellent

xthemafja

  • Member
  • Posts: 348
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

Did you know?

There are 60,000 miles of blood vessels in every adult human.

Did you know?

Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.

Did you know?

Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.

Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

Refraction Through Uniform and Variable Thickness Glasses Refraction Through Uniform and Variable Thickness Glasses
Anterior view of abdomen divided by quadrants Anterior view of abdomen divided by quadrants
When the United States gets stuck over a controversial issue—usually something a divided Congress ca When the United States gets stuck over a controversial issue—usually something a divided Congress ca
An example of a Material Safety Data Sheet (MSDS). An example of a Material Safety Data Sheet (MSDS).
A wrench after it has been forged but before the flashing (extra material around the wrench) has ... A wrench after it has been forged but before the flashing (extra material around the wrench) has ...
Dolly, a Finn Dorset sheep cloned from the genetic material o Dolly, a Finn Dorset sheep cloned from the genetic material o
Video: Types of Shock (Part 2 of 2)

For a complete list of videos, visit our video library