« previous next »

Author Question: The mirrors for X-ray telescopes are the same shape as those of optical reflectors. Indicate ... (Read 26 times)

Jipu 123

  • Hero Member
  • *****
  • Posts: 569
on: Jul 27, 2018
The mirrors for X-ray telescopes are the same shape as those of optical reflectors.
 
  Indicate whether the statement is true or false

Question 2

Why is a dense cloud more likely to produce an elliptical galaxy than a spiral galaxy?
 
  A) The higher density of gas has a stronger force of gravity, and therefore the cloud collapses more quickly.
  B) The thickness of the dense cloud prevents a disk from forming.
  C) The higher gas density forms stars more efficiently, so all the gas is converted into stars before a disk can form.
  D) The force of gravity can pull the material into a more spherical shape.
  E) The more frequent collisions between particles randomize the particle orbits.


lolol

  • Sr. Member
  • ****
  • Posts: 330
Reply #1 on: Jul 27, 2018
Answer to Question 1

FALSE

Answer to Question 2

C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

Did you know?

Asthma attacks and symptoms usually get started by specific triggers (such as viruses, allergies, gases, and air particles). You should talk to your doctor about these triggers and find ways to avoid or get rid of them.

Did you know?

Signs and symptoms that may signify an eye tumor include general blurred vision, bulging eye(s), double vision, a sensation of a foreign body in the eye(s), iris defects, limited ability to move the eyelid(s), limited ability to move the eye(s), pain or discomfort in or around the eyes or eyelids, red or pink eyes, white or cloud spots on the eye(s), colored spots on the eyelid(s), swelling around the eyes, swollen eyelid(s), and general vision loss.

Did you know?

Human kidneys will clean about 1 million gallons of blood in an average lifetime.

Did you know?

More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.

(A) The name and shape of the adult teeth. These teeth represent those found in the right side of th (A) The name and shape of the adult teeth. These teeth represent those found in the right side of th
Funny optical illusion Funny optical illusion
Naughty Optical Illusion Naughty Optical Illusion
Grazing Incidence X-ray Telescopes Grazing Incidence X-ray Telescopes
Workshop of Kane Kwei, Coffin in the shape of a film projector, Teshi area, Ghana, Africa. 2013. Workshop of Kane Kwei, Coffin in the shape of a film projector, Teshi area, Ghana, Africa. 2013.
Spacecraft optimum geometrical shape Spacecraft optimum geometrical shape
Video: Power Supply Polyacrylamide Gel Protein Sample

For a complete list of videos, visit our video library