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

Author Question: About what percentage of molecules in the air make up the atmosphere below a 6-kilometer altitude? ... (Read 96 times)

lbcchick

  • Hero Member
  • *****
  • Posts: 550
on: Jul 29, 2018
About what percentage of molecules in the air make up the atmosphere below a 6-kilometer altitude?
 
  A) 20
  B) 30
  C) 40
  D) 50
  E) more than 50

Question 2

A block of wood with a piece of iron tied to the top of it floats in a bucket of water. If the wood and iron are turned over so that the iron is submerged beneath the wood, the water level at the side of the bucket
 
  A) rises.
  B) falls.
  C) remains the same.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

zenzy

  • Sr. Member
  • ****
  • Posts: 336
Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: E

Answer to Question 2

Answer: C


lbcchick

  • Hero Member
  • *****
  • Posts: 550
Reply #2 on: Jul 29, 2018
Both answers were spot on, thank you once again


zenzy

  • Sr. Member
  • ****
  • Posts: 336
Reply #3 on: Jul 29, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

Did you know?

The Centers for Disease Control and Prevention has released reports detailing the deaths of infants (younger than 1 year of age) who died after being given cold and cough medications. This underscores the importance of educating parents that children younger than 2 years of age should never be given over-the-counter cold and cough medications without consulting their physicians.

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?

This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.

Did you know?

The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.

Mechanisms of water movement from soil through plants to the atmosphere. Mechanisms of water movement from soil through plants to the atmosphere.
Titan's dense atmosphere shrouds the moon beneath a tan haze in this image. Titan's dense atmosphere shrouds the moon beneath a tan haze in this image.
Active transport of molecules Active transport of molecules
Water-soluble organic molecules. Water-soluble organic molecules.
“Windows” Through the Atmosphere “Windows” Through the Atmosphere
Using the Ti plasmid to make a transgenic plant Using the Ti plasmid to make a transgenic plant
Video: Metaphase I Animation

For a complete list of videos, visit our video library