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

Author Question: What was the most commonly used refrigerant gas for geothermal pumps for almost one hundred years? ... (Read 12 times)

hbsimmons88

  • Hero Member
  • *****
  • Posts: 526
on: Jul 21, 2018
What was the most commonly used refrigerant gas for geothermal pumps for almost one hundred years?
 
 

a. chlorofluorocarbons (CFCs) c. carbon dioxide (CO2)
  b. hydrogen sulfide (H2S) d. methane (CH4)



Question 2

A device that utilizes the constant temperature of the ground near the surface of the Earth as a method of heating or cooling depending on the time of year is called a(n) ____.
 
 

a. heat sink c. radiational sink
  b. heat pump d. compressor pump



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

KKcool

  • Sr. Member
  • ****
  • Posts: 340
Reply #1 on: Jul 21, 2018
Answer to Question 1

A

Answer to Question 2

B


hbsimmons88

  • Member
  • Posts: 526
Reply 2 on: Jul 21, 2018
Great answer, keep it coming :)

robbielu01

  • Member
  • Posts: 336
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

Did you know?

Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.

Did you know?

Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

Did you know?

The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.

Did you know?

Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

History of the number of observed sunspots during the last 250 years, which shows the ~11-year solar History of the number of observed sunspots during the last 250 years, which shows the ~11-year solar
Uranus revolves around the Sun once every 84 Earth years. Its average distance from the Sun is rough Uranus revolves around the Sun once every 84 Earth years. Its average distance from the Sun is rough
A $50 000 bond bearing interest at 6.5% bond payable semi-annually matures in 10 years. If it ... A $50 000 bond bearing interest at 6.5% bond payable semi-annually matures in 10 years. If it ...
Some of the most commonly used radiometric dating methods Some of the most commonly used radiometric dating methods
What amount was invested 35 years ago at 7% compounded semiannually if the value of the ... What amount was invested 35 years ago at 7% compounded semiannually if the value of the ...
Earth 150 Million Years Ago Earth 150 Million Years Ago
Video: Requirements for nervous signals

For a complete list of videos, visit our video library