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 7 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
Excellent

xiaomengxian

  • Member
  • Posts: 311
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

The effects of organophosphate poisoning are referred to by using the abbreviations “SLUD” or “SLUDGE,” It stands for: salivation, lacrimation, urination, defecation, GI upset, and emesis.

Did you know?

Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.

Did you know?

Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.

Did you know?

Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

Did you know?

More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.

History of the number of observed sunspots during the last 250 years, which shows the ~11-year solar History of the number of observed sunspots during the last 250 years, which shows the ~11-year solar
Sterilization Time Requirements Sterilization Time Requirements
Healthier choices can be made when time is taken to read a nutrition label. Healthier choices can be made when time is taken to read a nutrition label.
Life Cycle Nutrition: Pregnancy through Infancy Life Cycle Nutrition: Pregnancy through Infancy
If the frequency equals 60 Hz in Figure 10-1, what is the value of capacitance? If the frequency equals 60 Hz in Figure 10-1, what is the value of capacitance?
The Geologic Time Scale The Geologic Time Scale
Video: Evolutionary tree of life Animation

For a complete list of videos, visit our video library