1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
vaieri [72.5K]
3 years ago
7

What is the likelihood that black holes exist in our galaxy? Explain your response.

Physics
2 answers:
Vinil7 [7]3 years ago
8 0

Black Hole

___________

It is the most mysterious thing in our universe.

✳ John Michell was the first scientist who gave his idea on black hole in 1783

✳ later than Pière simon described black holes in his book the system of the world in 1796.

What are black holes?

=>  It is also a celestial body which have infinite gravitational force and infinite mass and even light can not escape from it.

=> If any object goes near a black hole then time slows down for that object.

How black holes formed?

=> Mostly  black holes formed because of compression of mass and density of stars.

So,  first we know how stars formed and then black holes.

= stars are formed by the cloud of  gas and dust present in our universe which we simply called as Nebula.

= They are mostly composed of hydrogen and helium with some amount of another elements.

= when the density of nebula decreases then they contract because of their  gravitational force and then its temperature rises at very high level and in that temperature hydrogen atom makes helium by fusion reaction and because of the speed of hydrogen atom and also heat the nebula takes a spherical shape which we call star.

Now black hole formation -

= The gravitational force of stats are balanced by their heat.

And hydrogen acts as a fuel for it.

= and when its hydrogen  finishes then with passage of  time that star cools down and then its mass and density  becomes 4 times greater then its original mass and density.

And then that star can't control its gravitational force and then a blast occurs which we call supernova.

And after this blast if any of the piece of that star which have more mass remains then it becomes a star which have mass and density of a critical level and we call this as  Neutron star.

In this type of Neutron star because of its gravitational force then it starts contracting  and after contracting it at a critical level then it becomes a body which have infinite density and mass and because of this infinte density and mass the space time bents inward there and then it doesn't be there and we call this as a black hole.

Its whole mass is focused at center which we call it

✳ central singularity point 

And the boundary of black hole is called

✳ event horizon

And nothing can escape from here even light can't.

And here concept of time doesn't work.

=>  According to theory of relativity if the object is near the black hole then the time slows down for it.

Types of black holes

1. Stellar mass black hole

~> It is the type of black hole formed because of contraction of a star which have mass about 3 times greater than the sun.

2. Super massive black holes

~> It is formed in center of any galaxy and have infinite mass and gravitational force and it has mass about 100000000 times that of sun.

3. Permordial or small black holes

~> They are formed because of the more heat at the center of a star and the mass of that star is less than that of our sun.

Physicist  think that  they formed with the beginning of universe

✳ the nearest black from earth is 

cygnus x1

Mashcka [7]3 years ago
4 0
Black holes are great amounts of matter packed into a small space. When massive stars collapse upon themselves. When stars aren't able to fuel themselves they become compact. Which turn into black holes.
You might be interested in
A boy throws a ball and accidentally breaks a window. The momentum of the ball and all the pieces of glass taken together after
Aleks [24]
When a boy throws a ball and accidentally breaks a window, the momentum of the ball and all the pieces of glass taken together after the collision is THE SAME as the momentum of the ball before the collision

hope this helps
6 0
3 years ago
Read 2 more answers
Why is the density of iron higher than the density of oxygen?
pentagon [3]

Answer:

Density of iron is higher than the density of oxygen because iron is solid and the particles in it are very compact but oxygen is not dense as it is gas and particles in it are loosely packed.

7 0
3 years ago
Explain why engineers leave a gap in a concrete bridge (answer must relate to density)
seraphim [82]
<span>Different materials expand and contract at different rates based on temperature. Just like if you leave a plastic bottle full of water in a freezer it will burst, but if you leave it partially full no problem.....Ok?Expansion joints do the same for bridges. There is a gap to allow for temperature related expansions and contractions. Sometimes you drive over bridges and roadways where this movement is constricted and you might notice a bumpy ride. Engineers can predict the variation of structural length based on span lengths and leave the necessary gaps.....btw, NICE QUESTION:)</span>


6 0
3 years ago
Which of the following shows the units of angular motion?
Whitepunk [10]

Answer:

  • The units are <em>(</em><em>rad</em><em>/</em><em>s</em><em>^</em><em>2</em><em>)</em><em> </em>
4 0
3 years ago
A box has 1000N of force. It has an acceleration of 10 m/s/s. What is the mass of the box?
OverLord2011 [107]

Answer:

he tension in an elevator cable is 10,000 N. The elevator itself has a mass of 500 kg.

Explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • WILL GIVE BRAINLIEST!
    8·1 answer
  • That 85 kg paratrooper from the 50's was moving at constant speed of 56 m/s because the air was applying a frictional drag force
    13·1 answer
  • With what tension must a rope with length 2.20 m and mass 0.150 kg be stretched for transverse waves of frequency 43.0 hz to hav
    8·1 answer
  • A cylinder containing an ideal gas has a volume of 2.6 m3 and a pressure of 1.5 × 105 Pa at a temperature of 300 K. The cylinder
    6·1 answer
  • Al is floating freely in her spacecraft, and you are accelerating away from her with an acceleration of 1g. 5) How will you feel
    10·1 answer
  • Mt. Everest is 20,028 feet high. How many miles is this? ( there are 5,280 feet in a mile)
    15·2 answers
  • How do driver of cars use galvanometer
    12·1 answer
  • What natural phenomena could serve as alternative time standards?
    15·1 answer
  • A motorcycle has a constant acceleration of 2.5 meters per second squared
    11·1 answer
  • One exciting fairground ride acts like a gaint catapuit. The capsule which the 'rider' is strapped in is fired high into the sky
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!