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

Author Question: Why is it so difficult to study the center of our galaxy? a. Light from the center is lost in the ... (Read 83 times)

frankwu

  • Hero Member
  • *****
  • Posts: 549
Why is it so difficult to study the center of our galaxy?
 
  a. Light from the center is lost in the glow of emission nebulae in this direction.
 b. Interstellar dust blocks almost all light before it reaches Earth.
 c. The exact position of the center is not known.
 d. The center of the galaxy puts out very little radiation and is too dim to study.
 e. The center of the galaxy is too far away for radiation to be detected by telescopes.

Question 2

Newton's law of gravitational force states that ____.
 
  a. an object with no force on acting on it continues at rest or moves in uniform motion in a straight line with constant velocity
  b. an object with no force on it moves in a straight line with constant acceleration
 c. for every action, there is an equal and opposite reaction
 d. the force between two objects is directly proportional to the product of their masses and inversely proportional to the distance between them squared
  e. an object with a force on it is accelerated in the direction of the force an amount inversely proportional to its mass and directly proportional to the size of the force



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

aprice35067

  • Sr. Member
  • ****
  • Posts: 337
Answer to Question 1

b

Answer to Question 2

d





 

Did you know?

Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.

Did you know?

Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.

Did you know?

People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.

Did you know?

Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

Did you know?

To maintain good kidney function, you should drink at least 3 quarts of water daily. Water dilutes urine and helps prevent concentrations of salts and minerals that can lead to kidney stone formation. Chronic dehydration is a major contributor to the development of kidney stones.

For a complete list of videos, visit our video library