This topic contains a solution. Click here to go to the answer

Author Question: A small bottle of perfume is opened and the scent quickly fills the air. By the next day, however, ... (Read 482 times)

jerry coleman

  • Hero Member
  • *****
  • Posts: 570
A small bottle of perfume is opened and the scent quickly fills the air. By the next day, however, the bottle is empty and the perfume can no longer be smelled.
 
  Have the molecules in the perfume disappeared? Explain why the bottle is empty and why the perfume can not be detected.

Question 2

What prompted early scientists to propose that the ray of the cathode ray tube was actually a negatively charged particle?
 
  A) The ray was present regardless of gas, or even without a gas.
  B) The ray was attracted to positively charge electric plates.
  C) The ray was not seen from the positively charged anode.
  D) The ray could be diverted by a magnetic field.
  E) The ray would change colors depending on which gas was used inside the tube.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

frankwu0507

  • Sr. Member
  • ****
  • Posts: 322
Answer to Question 1

No, the perfume has not disappeared. Perfume is an example of matter so it is made up of submicroscopic particles. We can smell perfume because some of the particles enter our nose. Over time the bottle becomes empty as all of the particles leave the perfume and move into the air and spread out into the room. The perfume can no longer be detected because the individual particles in the air are too small to see and are too spread out to smell.

Answer to Question 2

B




jerry coleman

  • Member
  • Posts: 570
Reply 2 on: Aug 27, 2018
Thanks for the timely response, appreciate it


TheDev123

  • Member
  • Posts: 332
Reply 3 on: Yesterday
Gracias!

 

Did you know?

In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

Did you know?

The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.

Did you know?

Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.

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.

Did you know?

Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.

For a complete list of videos, visit our video library