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

Author Question: The process by which molecules escape from a solid directly into the gas phase is called A) ... (Read 104 times)

nelaaney

  • Hero Member
  • *****
  • Posts: 560
on: Jul 27, 2018
The process by which molecules escape from a solid directly into the gas phase is called
 
  A) gasification
  B) evaporation
  C) condensation
  D) sublimation

Question 2

Briefly explain how we can use spectral lines to determine an object's radial motion. Can we also learn the object's tangential motion (across our line of sight) from its spectral lines?
 
  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

abro1885

  • Sr. Member
  • ****
  • Posts: 337
Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

By comparing the wavelength of the spectral lines in the object's spectrum to the rest wavelengths of the same lines, we measure the Doppler shift. This tells us the object's radial motion: A shift toward shorter wavelength means the object is moving toward us, and a shift to longer wavelength means it is moving away from us. We cannot learn anything about the object's tangential motion from its spectral lines because this does not affect the line positions.


nelaaney

  • Member
  • Posts: 560
Reply 2 on: Jul 27, 2018
Gracias!

Dnite

  • Member
  • Posts: 297
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.

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?

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?

Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

Did you know?

Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.

Coracoid process Coracoid process
These illustrations show Ellen Craft, a slave with and without a disguise. She dressed “as a disting These illustrations show Ellen Craft, a slave with and without a disguise. She dressed “as a disting
Process Flow Diagram of a Dual-Stage Pressure System Process Flow Diagram of a Dual-Stage Pressure System
The injector on-time is called the pulse width. The injector on-time is called the pulse width.
Composition of Municipal Solid Waste Composition of Municipal Solid Waste
Different forms of a gene are called alleles Different forms of a gene are called alleles
Video: Atrophy

For a complete list of videos, visit our video library