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

Author Question: Two motors in a factory are running at slightly different rates. One runs at 825.0 rpm and the other ... (Read 52 times)

CORALGRILL2014

  • Hero Member
  • *****
  • Posts: 525
on: Jul 29, 2018
Two motors in a factory are running at slightly different rates. One runs at 825.0 rpm and the other at You hear the sound intensity increase and then decrease periodically due to wave interference.
 
  How long does it take between successive instances of the sound intensity increasing?
  A) 1.79 s B) 1.43 s C) 1.54 s D) 1.66 s

Question 2

How many molecules are in (a) 1.0 cm3 of air at STP and (b) 1.0 cm3 of helium at STP? (R = 8.31 J/mol  K, NA = 6.022  1023 molecules/mol)
 
  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

sierramartinez

  • Sr. Member
  • ****
  • Posts: 313
Reply #1 on: Jul 29, 2018
Answer to Question 1

C

Answer to Question 2

2.7  1019 molecules in both cases


CORALGRILL2014

  • Member
  • Posts: 525
Reply 2 on: Jul 29, 2018
Gracias!

anyusername12131

  • Member
  • Posts: 327
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Hip fractures are the most serious consequences of osteoporosis. The incidence of hip fractures increases with each decade among patients in their 60s to patients in their 90s for both women and men of all populations. Men and women older than 80 years of age show the highest incidence of hip fractures.

Did you know?

The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.

Did you know?

In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.

Did you know?

The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.

Did you know?

There are approximately 3 million unintended pregnancies in the United States each year.

Child Labor Rates and GDP Worldwide Child Labor Rates and GDP Worldwide
Chlamydia Rates in Women Chlamydia Rates in Women
All fuel injectors should make the same sound with the engine running at idle speed. A lack of sound ... All fuel injectors should make the same sound with the engine running at idle speed. A lack of sound ...
A free-running circadian sleep–wake cycle 25.3 hours in duration. Despite living in an unchanging ... A free-running circadian sleep–wake cycle 25.3 hours in duration. Despite living in an unchanging ...
Saving and Investment Rates of Industrialized Countries, 1960–1974 Saving and Investment Rates of Industrialized Countries, 1960–1974
Running with Terry Fox Running with Terry Fox
Video: Proteins

For a complete list of videos, visit our video library