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

Author Question: The units of proper motion are km/s because proper motion is the motion of stars across the sky. ... (Read 143 times)

viki

  • Hero Member
  • *****
  • Posts: 525
on: Jul 27, 2018
The units of proper motion are km/s because proper motion is the motion of stars across the sky.
 
  a. True
  b. False
  Indicate whether the statement is true or false

Question 2

A star has crossed the birth line and thus that star is now called a ________________.
 
  a. main-sequence star b. protostar
  c. YSO d. ZAMS


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

meryzewe

  • Sr. Member
  • ****
  • Posts: 346
Reply #1 on: Jul 27, 2018
Answer to Question 1

False
RATIONALE: Units are not linear but angular so, for example, units of proper motion could be arc seconds/yr.

Answer to Question 2

c


viki

  • Hero Member
  • *****
  • Posts: 525
Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


meryzewe

  • Sr. Member
  • ****
  • Posts: 346
Reply #3 on: Jul 27, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

Did you know?

The newest statin drug, rosuvastatin, has been called a superstatin because it appears to reduce LDL cholesterol to a greater degree than the other approved statin drugs.

Did you know?

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

Did you know?

Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

Did you know?

Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.

Astronomers identified 12-billion-year-old white dwarf stars only 100 light years away from Earth Astronomers identified 12-billion-year-old white dwarf stars only 100 light years away from Earth
Major moons of Uranus in order of increasing distance (left to right), at their proper relative size Major moons of Uranus in order of increasing distance (left to right), at their proper relative size
Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones
Stars and the Interstellar Medium Stars and the Interstellar Medium
Dread Scott. What Is the Proper Way to Display a U.S. Flag? Dread Scott. What Is the Proper Way to Display a U.S. Flag?
Visual aids, such as proper walking shoes and a pedometer, or an illustration showing someone ... Visual aids, such as proper walking shoes and a pedometer, or an illustration showing someone ...
Video: Krebs cycle : Formation of acetyl coenzyme A and Electron transport chain

For a complete list of videos, visit our video library