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

Author Question: What is the significance of the Tully-Fisher relation? ... (Read 85 times)

futuristic

  • Hero Member
  • *****
  • Posts: 638
What is the significance of the Tully-Fisher relation?

Question 2

What happens to the magnitude of the magnetic field inside a long solenoid if the radius is doubled?
  1.It becomes four times larger.
  2.It becomes twice as large.
  3.It is unchanged.
  4.It becomes one-half as large.
  5.It becomes one-fourth as large.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

britb2u

  • Sr. Member
  • ****
  • Posts: 331
Answer to Question 1

The Tully-Fisher relation gives astronomers another direct measurement tool for
determining the absolute magnitude of a spiral galaxy using the width of H2 lines in
the light spectrum that is independent of the radial motion measurements made using
red-shifts.

Answer to Question 2

3



futuristic

  • Hero Member
  • *****
  • Posts: 638

britb2u

  • Sr. Member
  • ****
  • Posts: 331
You're welcome



 

Did you know?

Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.

Did you know?

Oxytocin is recommended only for pregnancies that have a medical reason for inducing labor (such as eclampsia) and is not recommended for elective procedures or for making the birthing process more convenient.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates’s recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.

Did you know?

Common abbreviations that cause medication errors include U (unit), mg (milligram), QD (every day), SC (subcutaneous), TIW (three times per week), D/C (discharge or discontinue), HS (at bedtime or "hours of sleep"), cc (cubic centimeters), and AU (each ear).

For a complete list of videos, visit our video library