« previous next »

Author Question: A transformer is used to step up the voltage to a power line. If the stepped-up voltage is 10 times ... (Read 157 times)

stock

  • Hero Member
  • *****
  • Posts: 573
on: Jul 28, 2018
A transformer is used to step up the voltage to a power line. If the stepped-up voltage is 10 times the original value, by how much will the power loss in the line decrease?
 a. more than 95
  b. between 10 and 20
  c. between 20 and 95
  d. There will be no change since the power into a transformer equals the power out.

Question 2

When two sound waves are out of phase by _____, destructive interference will occur.
 a. 90
  c. 540
  b. 270
  d. 720


meryzewe

  • Sr. Member
  • ****
  • Posts: 346
Reply #1 on: Jul 28, 2018
Answer to Question 1

A

Answer to Question 2

C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

stock

  • Hero Member
  • *****
  • Posts: 573
Reply #2 on: Jul 28, 2018
Thank you!


meryzewe

  • Sr. Member
  • ****
  • Posts: 346
Reply #3 on: Jul 28, 2018
Always glad to help...


« previous next »
 

Did you know?

Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

Did you know?

Human kidneys will clean about 1 million gallons of blood in an average lifetime.

Did you know?

Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.

Did you know?

The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

Did you know?

There are more sensory neurons in the tongue than in any other part of the body.

Ten-step pathway for de novo synthesis of IMP Ten-step pathway for de novo synthesis of IMP
People have seen patterns in the stars since ancient times.[5] This 1690 depiction of the constellat People have seen patterns in the stars since ancient times.[5] This 1690 depiction of the constellat
Current Resistance and Voltage Current Resistance and Voltage
The schematic of a variable valve timing control circuit, showing that battery power (+) is being ... The schematic of a variable valve timing control circuit, showing that battery power (+) is being ...
The engine is rotated until the timing marks on the front of the crankshaft line up with zero ... The engine is rotated until the timing marks on the front of the crankshaft line up with zero ...
The Power of Classical Conditioning The Power of Classical Conditioning
Video: Lipid digestion - mouth, stomach and small intestine

For a complete list of videos, visit our video library