1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
nekit [7.7K]
3 years ago
14

A sound wave traveling downward with a speed of about 4,000 m/s suddenly slows to 1,500 m/s not far below the Earth’s surface. W

hat has the sound wave most likely encountered? (Its B) A. a different kind of rock B. an underground lake C. an open cavity D. a pile of dinosaur bones
History
1 answer:
mash [69]3 years ago
3 0

The correct answer is B. An underground lake

Explanation:

Sound moves more slowly in liquids or gases than in solids, in which particles are together. Additionally, the speed of sound is measured in meters per second or m/s. In this context, if the speed of a sound wave reduced from 4,000 m/s to 1,500 m/s while traveling through the surface of Earth, which is solid, it is likely the cause is a change in the medium the wave is going through.

Moreover, the average speed of sound in air is below 400 m/s, this suggests the sound was not traveling through an open cavity. However, the speed in liquids such as water is around 1480 m/s, this is quite similar to the second speed registered. According to this, the sound wave slowed because it was traveling through a liquid medium; therefore, the answer is an underground lake.

You might be interested in
How did ww2 affect the civil rights movement?
blsea [12.9K]
Well during the war the blacks fought along side of the whites and it showed the people back at home that it really wasn't that bad to be equal. However the people in the south will remain racist and try to keep segregation within the law. <span />
8 0
3 years ago
What was the Charter of 1732 and what did it do?
adell [148]

Answer:

La carta corporativa de la colonia fue otorgada al General James Oglethorpe el 21 de abril de 1732 por Jorge II, por quien la colonia fue nombrada. Oglethorpe imaginó una colonia que serviría como refugio para los ingleses que habían sido encarcelados por deudas.

Explanation:

5 0
3 years ago
Read 2 more answers
A governor can veto one or more parts of a bill without rejecting the entire bill. what is this power called?
Anna [14]
The correct answer is <span>item veto. Basically, it's like when a teacher goes through your test and just the paper is covered in red. He vetoes only parts of it that he doesn't like and keeps what he does and the people who created the bill have to change it if they want it to be accepted.</span>
8 0
3 years ago
According to this map, most of the land in Brazil is used for what purpose?
schepotkina [342]

Answer:

Forest is the correct option.

Explanation:

Sixty percent of land in Brazil consist o forest and the share of Arable land is 32 percent. It is also the most bio diverse countries in the world. The bulk of the Brazilian forest lies in the Amazon Basin. But the country is witnessing the loss of forest cover in the past few years. Especially after the 1970's it has lost 19 percent of its forest cover area, due to the construction of Trans- Amazonian highway and the growing population in the Amazon basin.

Land use pattern in Brazil: 32 percent of the land is Arable Land. 60 percent is Forest Land and 5.2 percent of the land is used for other activities. Out of 32 percent of Arable land, less than one percent is used for growing permanent crops, while 23 percent is permanent pasture.

7 0
3 years ago
Read 2 more answers
1. What were the duties of women during the Civil War and what challenges did they face?​
damaskus [11]

Answer:

During the Civil War many women supported and helped by aiding as nurses servings as spies for Union armies some women even served in the military even though it was forbidden. Many had also gathered food for Troops.

Explanation: After the war many women had to go back to the traditional housewives which many of them were not ready to do. During this time many women were told to return to their proper places like cooking cleaning, and watching after the children this took a while for women to adjust to after the Civil War.

8 0
3 years ago
Other questions:
  • What is the importance of the government sponsorship william shakespeare?
    8·1 answer
  • What is the answer for this question?
    8·1 answer
  • In the summer of 1942 the United States began fighting a different kind of war in the pacific than it had been fighting up to th
    9·1 answer
  • What is the definition of a pogrom?
    8·1 answer
  • If All- India Muslim League would have won in the elections of 1937, what kind of environment you think would have been created
    7·1 answer
  • Drag the tiles to the correct boxes to complete the pairs.
    10·1 answer
  • MAKE A LIST ANSWERING THE FOLLOWING QUESTIONS TO PREDICT THE EFFECTS OF THE LOUISIANA PURCHASE: HOW MUCH LAND WAS GAINED IN THE
    8·1 answer
  • One way in which Jefferson Davis and Abraham Lincoln were alike was that both *
    6·1 answer
  • From 1880 to 1930 how many immigrants came to the us.
    10·1 answer
  • What two houses make up Congress?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!