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

Author Question: Why must both parallax and proper motion be known to give transverse velocity? What will be an ... (Read 59 times)

chads108

  • Hero Member
  • *****
  • Posts: 507
on: Jul 27, 2018
Why must both parallax and proper motion be known to give transverse velocity?
 
  What will be an ideal response?

Question 2

Which of these is NOT typical of the Galaxy's spiral arms?
 
  A) open clusters
  B) Population II giants like orange Arcturus
  C) emission nebulae like M42
  D) hot, young blue Population I stars
  E) O and B stars


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Jordin Calloway

  • Sr. Member
  • ****
  • Posts: 334
Reply #1 on: Jul 27, 2018
Answer to Question 1

To turn the star's apparent motion across our line of sight into its real velocity in that direction, we also need to know the actual distance from parallax data.

Answer to Question 2

B


chads108

  • Member
  • Posts: 507
Reply 2 on: Jul 27, 2018
Wow, this really help

tandmlomax84

  • Member
  • Posts: 323
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.

Did you know?

A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

Did you know?

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

Did you know?

There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

Did you know?

The average office desk has 400 times more bacteria on it than a toilet.

A Heliocentric Explanation of Retrograde Motion A Heliocentric Explanation of Retrograde Motion
Positive velocity graph Positive velocity graph
Goniometer measure of joint range of motion Goniometer measure of joint range of motion
Give the world a reason to remember your name Give the world a reason to remember your name
Physics 12 - Interpreting Motion Physics 12 - Interpreting Motion
Motion in 2D Motion in 2D
Video: Dissociative Disorders (Part 2)

For a complete list of videos, visit our video library