English, 12.02.2020 07:33 Gunn2368

HELP PL

Excerpt from Understanding Speed and Sound
Marie Devers

Did you ever think about what sound is made of? Did you know that sounds move at a certain speed? Learning about sonic booms can help you appreciate just how rapidly sound can travel. To understand the term sonic boom, you must first examine some scientific notions. You should realize that everything is composed of molecules. Even air—which may seem like nothing—is made up of molecules. Sound acts like a wave that shoves these molecules around. Some air molecules compress, or move close together, while others spread apart. As molecules move, they force other molecules to relocate. This movement allows sound to travel through the resulting empty space. The speed of sound is the rate at which sound travels through this space.
Which is the topic sentence of paragraph 1?

A) You should realize that everything is composed of molecules.
B) This movement allows sound to travel through the resulting empty space.
C) The speed of sound is the rate at which sound travels through this space.
D) Learning about sonic booms can help you appreciate just how rapidly sound can travel.

Answers: 3

Show answers

Other questions on the subject: English

English, 22.06.2019 02:00, klogsdon4380

Read the sentence. the great wave was inexpensive to purchase, costing only about the same as a double of noodles. since lots of copies could be printed and still look good, it made loads of money. which best revises this sentence to create a more formal style and tone? *the great wave was as cheap as buying a double of noodles. since lots of copies could be made and still look great, people started making piles of money. *the great wave was inexpensive to purchase, costing about the same as a double of noodles. since mass quantities could be produced and still look exquisite, it became highly profitable to sell. *the great wave cost next to nothing, practically the same as a double of noodles. since mass quantities could be produced and still look awesome, it became highly profitable to sell. *the great wave was inexpensive to purchase, similar to buying a double of noodles. since lots of copies could be made that still looked amazing, those who sold it made tons of money.

Answers: 1

continue

English, 22.06.2019 03:30, pam93

How is the word laud and welcome different

Answers: 1

continue

English, 22.06.2019 05:40, caldonia2018

Can someone “think of a time you overcame a challenge or obstacle. describe the experience in two or three sentences”

Answers: 1

continue

English, 22.06.2019 07:10, EMQPWE

Which except is told from first-person point of view