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

Author Question: Why is it so difficult to study the center of our galaxy? a. Light from the center is lost in the ... (Read 144 times)

frankwu

  • Hero Member
  • *****
  • Posts: 549
on: Jul 27, 2018
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
Reply #1 on: Jul 27, 2018
Answer to Question 1

b

Answer to Question 2

d


frankwu

  • Hero Member
  • *****
  • Posts: 549
Reply #2 on: Jul 27, 2018
TY


aprice35067

  • Sr. Member
  • ****
  • Posts: 337
Reply #3 on: Jul 27, 2018
You're welcome


« previous next »
 

Did you know?

People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.

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?

When taking monoamine oxidase inhibitors, people should avoid a variety of foods, which include alcoholic beverages, bean curd, broad (fava) bean pods, cheese, fish, ginseng, protein extracts, meat, sauerkraut, shrimp paste, soups, and yeast.

Did you know?

Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.

Did you know?

According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.

A laser-guided observation of the Milky Way Galaxy at the Paranal Observatory in Chile in 2010. A laser-guided observation of the Milky Way Galaxy at the Paranal Observatory in Chile in 2010.
Ultraviolet mosaic of Mira's bow shock and tail obtained using NASA's Galaxy Evolution Exp Ultraviolet mosaic of Mira's bow shock and tail obtained using NASA's Galaxy Evolution Exp
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
An example of light palpation of the abdomen. (B) the physician uses two hands for deep bimanual ... An example of light palpation of the abdomen. (B) the physician uses two hands for deep bimanual ...
Peptide Arrays - light-directed, spatially patterned oligopeptide synthesis Peptide Arrays - light-directed, spatially patterned oligopeptide synthesis
Normal tympanic membrane with cone of light and process of malleus Normal tympanic membrane with cone of light and process of malleus
Video: Reflex arc construction

For a complete list of videos, visit our video library