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

Author Question: Two mirrors are joined together along a common side, the planes of the mirrors separated by the ... (Read 87 times)

mrsjacobs44

  • Hero Member
  • *****
  • Posts: 500
on: Jul 28, 2018
Two mirrors are joined together along a common side, the planes of the mirrors separated by the angle q. If the joined mirrors can be used as a retroreflector when a beam of light strikes both surfaces (one after the other), what is the value of q?
 a. 90
  c. 45
  b. 135
  d. 30

Question 2

A solar heated house loses about 7.4  107 cal through its outer surfaces on a typical 24-hour winter day. What mass of storage rock is needed to provide this amount of heat if it is brought up to initial temperature of 62C by the solar collectors, and the house is maintained at 20C? (Specific heat of rock is 0.21 cal/g  C.)
 a. 160 kg
  c. 6100 kg
  b. 1200 kg
  d. 8400 kg


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

ilianabrrr

  • Sr. Member
  • ****
  • Posts: 332
Reply #1 on: Jul 28, 2018
Answer to Question 1

A

Answer to Question 2

D


mrsjacobs44

  • Member
  • Posts: 500
Reply 2 on: Jul 28, 2018
Great answer, keep it coming :)

yeungji

  • Member
  • Posts: 319
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

Did you know?

About 60% of newborn infants in the United States are jaundiced; that is, they look yellow. Kernicterus is a form of brain damage caused by excessive jaundice. When babies begin to be affected by excessive jaundice and begin to have brain damage, they become excessively lethargic.

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?

The U.S. Pharmacopeia Medication Errors Reporting Program states that approximately 50% of all medication errors involve insulin.

Did you know?

About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.

Interior nodes represent common ancestors Interior nodes represent common ancestors
Common Symptoms of Schizophrenia Common Symptoms of Schizophrenia
Forearm application to engage the common fascial restrictions in the trapezius and levator scapula ... Forearm application to engage the common fascial restrictions in the trapezius and levator scapula ...
Common Singular and Plural Endings Common Singular and Plural Endings
Common Abbreviations and Symbols Used by Massage Therapists Cont. Common Abbreviations and Symbols Used by Massage Therapists Cont.
Politics, Power and the Common Good: An Introduction to Political Science, 5/E Politics, Power and the Common Good: An Introduction to Political Science, 5/E
Video: Activation Energy - Valence Electrons

For a complete list of videos, visit our video library