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 108 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?

When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

Did you know?

Approximately 25% of all reported medication errors result from some kind of name confusion.

Did you know?

Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.

Did you know?

ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.

Did you know?

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

Rising and Setting of Stars at Middle North Latitudes Rising and Setting of Stars at Middle North Latitudes
General structure of eukaryotic pre-rRNA transcription units General structure of eukaryotic pre-rRNA transcription units
Select the proper adapter for the compression gauge. The threads on the adapter should match those ... Select the proper adapter for the compression gauge. The threads on the adapter should match those ...
Apply effleurage with wave motion to posterior cervical region. Use fingertips to slide along ... Apply effleurage with wave motion to posterior cervical region. Use fingertips to slide along ...
Physics 12 - Interpreting Motion Physics 12 - Interpreting Motion
Newton's Second Law of Motion: Use G.R.E.S.A. format Newton's Second Law of Motion: Use G.R.E.S.A. format
Video: Role of the respiratory system - effect of altered ventilation rates

For a complete list of videos, visit our video library