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

Author Question: In some countries the AC frequency is 50 Hz. What is the time interval for one cycle at this ... (Read 110 times)

Awilson837

  • Hero Member
  • *****
  • Posts: 509
on: Jul 28, 2018
In some countries the AC frequency is 50 Hz. What is the time interval for one cycle at this frequency?
 a. 0.0050 s
  c. 2 s
  b. 0.020 s
  d. 50 s

Question 2

What is the cause of refraction of a wave traveling from one medium to another?
 a. There is a frequency change due to the change in the medium
  b. There is a speed change due to the change in the medium.
  c. There is a change in wave amplitude due to the change in the medium.
  d. None of the above are associated with refraction.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

wilsonbho

  • Sr. Member
  • ****
  • Posts: 322
Reply #1 on: Jul 28, 2018
Answer to Question 1

B

Answer to Question 2

B


Awilson837

  • Member
  • Posts: 509
Reply 2 on: Jul 28, 2018
Gracias!

zacnyjessica

  • Member
  • Posts: 345
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

Did you know?

The average office desk has 400 times more bacteria on it than a toilet.

Did you know?

Fatal fungal infections may be able to resist newer antifungal drugs. Globally, fungal infections are often fatal due to the lack of access to multiple antifungals, which may be required to be utilized in combination. Single antifungals may not be enough to stop a fungal infection from causing the death of a patient.

Did you know?

Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

Did you know?

In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.

Cori cycle Cori cycle
Principles of time management Principles of time management
Elongation cycle. Elongation cycle.
Older adulthood can be a time of independence and exploration as responsibilities diminish and the ... Older adulthood can be a time of independence and exploration as responsibilities diminish and the ...
nitrogen cycle nitrogen cycle
The eukaryotic cell cycle. The eukaryotic cell cycle.
Video: Protein digestion - stomach & small intestine

For a complete list of videos, visit our video library