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

Author Question: Water circulates in a thermosiphon, hot water system because ________. a. a pump is used b. ... (Read 19 times)

pragya sharda

  • Hero Member
  • *****
  • Posts: 566
on: Jul 28, 2018
Water circulates in a thermosiphon, hot water system because ________.
 a. a pump is used
  b. gravity causes water to flow from the top of the collector to the bottom
  c. hot water is less dense than cold water
  d. solar energy is used to run the circulating pump

Question 2

A uniform ladder 15 ft long is leaning against a frictionless wall at an angle of 53 above the horizontal. The weight of the ladder is 30 pounds. A 75-lb boy climbs 6.0-ft up the ladder. What is the magnitude of the friction force exerted on the ladder by the floor?
 a. 43 lb
  b. 34 lb
  c. 38 lb
  d. 47 lb
  e. 24 lb


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Hdosisshsbshs

  • Sr. Member
  • ****
  • Posts: 315
Reply #1 on: Jul 28, 2018
Answer to Question 1

c

Answer to Question 2

B


pragya sharda

  • Member
  • Posts: 566
Reply 2 on: Jul 28, 2018
YES! Correct, THANKS for helping me on my review

xthemafja

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

« previous next »
 

Did you know?

The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

Did you know?

Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.

Did you know?

Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.

A vertebrate digestive system, as shown in the human. A vertebrate digestive system, as shown in the human.
Humpbacks frequently breach, throwing two thirds or more of their bodies out of the water and splash Humpbacks frequently breach, throwing two thirds or more of their bodies out of the water and splash
The urinary system: kidneys, ureters, bladder, and urethra with expanded view of a nephron and the u The urinary system: kidneys, ureters, bladder, and urethra with expanded view of a nephron and the u
Endocrine System - Fish Endocrine System - Fish
Endomembrane system Endomembrane system
The pressure valve maintains the system pressure and allows excess pressure to vent. The vacuum ... The pressure valve maintains the system pressure and allows excess pressure to vent. The vacuum ...
Video: Non-polar compounds - insolubility

For a complete list of videos, visit our video library