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
sattari [20]
2 years ago
12

How do scientists know our universe is older than 6500 years?

Physics
1 answer:
dmitriy555 [2]2 years ago
5 0
<span>This is because astronomers have discovered that the Crab Nebula is 6500 light years from earth. This means it takes 6500 earth years for light to get from the Crab Nebula to earth. Therefore, if we are able to observe the Crab Nebula and beyond it then it means that earth has been in existence for 6500 years and over.  </span>




You might be interested in
If the atomic mass of Sodium-18 is 18.02597 u, what is the binding energy?
Klio2033 [76]

Answer:

<h3>The binding energy of sodium Na=<em>5.407791×10⁹J</em></h3>

Explanation:

<h3>Greetings !</h3>

Binding energy, amount of energy required to separate a particle from a system of particles or to disperse all the particles of the system. Binding energy is especially applicable to subatomic particles in atomic nuclei, to electrons bound to nuclei in atoms, and to atoms and ions bound together in crystals.

<h2>Formula : Eb=(Δm)c²</h2><h3>where:Eb= binding energy</h3><h3> .Δm= mass defect(kg)</h3><h3> c= speed of light 3.00×10⁸ms¯¹</h3><h2 /><h3><u>Given</u><u> </u><u>values</u></h3>
  • m= 18.02597
  • c=3.00×10⁸ms¯¹

<h3><u>required </u><u>value</u></h3>
  • Eb=?

<h3><u>Solution:</u></h3>
  • Eb=(Δm)c²
  • Eb=(18.02597)*(3.00*10⁸ms¯¹
  • Eb=5.407791*10⁹J

8 0
1 year ago
Which of these people have a stressed induced stomachache
castortr0y [4]
Molly & Caden have a stressed
4 0
3 years ago
A doodler effect occurs when a source of sounds move
Alla [95]

Answer:

yes its true

Explanation:

8 0
3 years ago
Read 2 more answers
How much force is needed to keep the bowling ball moving towards the pins once it has
vazorg [7]

Answer:

Explanation:

The amount of force needed needs to be greater than all the forces acting in the opposite direction that the bowling ball was thrown. This includes air resistance, floor friction, gravity, and any other force involved. As long as the force acting on the bowling ball that is causing it to go in the direction of the pins is slightly greater than the opposite acting forces then it will continue in that direction. Since no values are provided we cannot calculate the actual precise value of force needed.

6 0
2 years ago
A submarine is 20m below the surface of the sea. the pressure due to the water at this depth is P. on another day, the submarine
satela [25.4K]

Answer:

1.7p

Explanation:

8 0
3 years ago
Other questions:
  • A whale swims due east for a distance of 6.9 km, turns around and goes due west for 1.8 km, and finally turns around again and h
    5·1 answer
  • The figure shows four forces exerted on a moving box, moving at a constant speed. If the box continues to move with the same spe
    12·2 answers
  • Please help i don’t get this
    9·1 answer
  • What is Mach 2 in miles per hour?
    13·1 answer
  • A block and a ball have the same mass and move with the same initial velocity across a floor and then encounter identical ramps.
    15·1 answer
  • Trafegando por uma avenida com velocidade constante de 54km/h, num dado instante, o motorista percebe o sinal vermelho à sua fre
    15·1 answer
  • PLS HEEEEEELPPPPPPPPP!!!!!!!!​
    15·1 answer
  • : A small block with mass 0.130 kg is attached to a string passing through a hole in a frictionless, horizontal surface. The blo
    7·1 answer
  • A cannonball is shot horizontally off a high castle wall at 47.4 m/s. What is the magnitude of the cannonball's velocity after 1
    10·1 answer
  • Review. An electron moves in a circular path perpendicular to a constant magnetic field of magnitude 1.00 mT . The angular momen
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!