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

Author Question: If the phase angle between sound waves from two different point sources is 180, what kind of ... (Read 56 times)

mp14

  • Hero Member
  • *****
  • Posts: 534
on: Jul 27, 2018
If the phase angle between sound waves from two different point sources is 180, what kind of interference will occur?
 
  A) destructive
  B) constructive
  C) either constructive or destructive

Question 2

Why do power tools with a plastic case not have a 3-prong plug but metal encased tools have (or should have) 3-prong plugs?
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

dawsa925

  • Sr. Member
  • ****
  • Posts: 326
Reply #1 on: Jul 27, 2018
Answer to Question 1

A

Answer to Question 2

The third wire (large round prong plug) connects to ground and grounds the metal case. A hot wire accidentally coming in contact with the case will blow a fuse. A plastic case is insulation and does not need to be grounded for safety.


mp14

  • Member
  • Posts: 534
Reply 2 on: Jul 27, 2018
Wow, this really help

momolu

  • Member
  • Posts: 320
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

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.

Did you know?

Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

Did you know?

As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.

Did you know?

ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.

Did you know?

The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.

Your Culture and Your Point of View Your Culture and Your Point of View
The leaky-barrel model: a settling-point model of eating and body weight homeostasis. The leaky-barrel model: a settling-point model of eating and body weight homeostasis.
Tim McGraw - Humble And Kind (Official Video) Tim McGraw - Humble And Kind (Official Video)
A Well of Sources for Bottled Water A Well of Sources for Bottled Water
Sound intensity log question Sound intensity log question
Chromosomes replicate during the S phase Chromosomes replicate during the S phase
Video: Secondary Active Transport

For a complete list of videos, visit our video library