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 61 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
YES! Correct, THANKS for helping me on my review

ASDFGJLO

  • Member
  • Posts: 335
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.

Did you know?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

Did you know?

Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.

Did you know?

Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

Did you know?

Illicit drug use costs the United States approximately $181 billion every year.

The locations of genetic material in animal and plant cells. The locations of genetic material in animal and plant cells.
A thermal pool in Yellowstone National Park. A thermal pool in Yellowstone National Park.
Overview of material uptake and long-distance transport processes in plants Overview of material uptake and long-distance transport processes in plants
Desert shrubs create distinctive thermal microclimates in the desert landscape Desert shrubs create distinctive thermal microclimates in the desert landscape
Refraction Through Uniform and Variable Thickness Glasses Refraction Through Uniform and Variable Thickness Glasses
Material safety data sheets (MSDS), now called safety data sheets (SDS), should be readily available ... Material safety data sheets (MSDS), now called safety data sheets (SDS), should be readily available ...
Video: Causes of Angina

For a complete list of videos, visit our video library