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vekshin1
3 years ago
8

What is the basic definition of a black hole?

Physics
1 answer:
polet [3.4K]3 years ago
8 0

Explanation:

Black holes are the most massive and dense objects in the whole universe. They are peculiar objects. The gravity near black hole is so strong that even light can not escape it. That is why the name: Black hole. It is formed after the death of a supermassive star. All the mass of the star is condensed in to a very small area having a very string gravity. Imagine the Sun squeezed in to an object of diameter of just 3 km!

You can define it as a dead super massive star from which nothing can escape.

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What is a fuel?
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Answer:

something that can be burned to produce heat

Explanation:

Combustion can be defined as an exothermic chemical reaction between physical substances, usually in the presence of oxygen and hydrocarbons to produce heat, light and carbon.

A fuel can be defined as something that can be burned to produce heat.

In the process of heat conduction, thermal energy is usually transferred from fast moving particles to slow moving particles during the collision of these particles. Also, thermal energy is typically transferred between objects that has different degrees of temperature and materials (particles) that are directly in contact with each other but differ in their ability to accept or give up electrons.

8 0
3 years ago
This is the change in velocity over the the time elaspear
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Acceleration is the change in velocity over time
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4 years ago
Read 2 more answers
Need help to get this question right!!
Charra [1.4K]

Answer:

16 times as strong

Explanation:

From the question given above, the following assumptions were made:

Initial Force (F₁) = F

Initial distance apart (r₁) = r

Final distance apart (r₂) = ¼r

Final force (F₂) =?

Next, we shall obtain a relationship between the force and the distance apart. This can be obtained as follow:

F = GM₁M₂ / r²

Cross multiply

Fr² = GM₁M₂

If G, M₁ and M₂ are kept constant, then,

F₁r₁² = F₂r₂²

Finally, we determine the new force as follow:

Initial Force (F₁) = F

Initial distance apart (r₁) = r

Final distance apart (r₂) = ¼r

Final force (F₂) =?

Fr² = F₂ × (¼r)²

Fr² = F₂ × r²/16

Fr² = F₂r² / 16

Cross multiply

16Fr² = F₂r²

Divide both side by r²

F₂ = 16Fr² / r²

F₂ = 16F

From the calculations made above, we can see that the new force is 16 times the original force.

Thus, the new force is 16 times stronger.

8 0
3 years ago
Imagine whirling a ball on a string over you head. Suppose the knot holding the ball comes loose and the ball is instantly relea
zaharov [31]

B is the answer to the question

8 0
3 years ago
whats grater than god,more evil than the devil,the poor have it the rich need it and if you eat it you die.what am I
dolphi86 [110]

Answer:

Nothing

Explanation:

The rich need nothing they already have a lot of stuff, the poor have nothing they are poor and do not have much. Nothing is greater than god and nothing is more evil than the devil.

6 0
3 years ago
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