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2 years ago

What happens in the core of a star that causes it to shine?? pls make it short

Physics

2 answers:

vodka [1.7K]2 years ago

8 0

Nuclear fusion, which releases energy.
We use the same process in the "hydrogen" bomb.

Oksi-84 [34.3K]2 years ago

3 0

The procedure that makes stars sparkle is the same one that we have outfit for utilization as a weapon: atomic combination.

Stars begin as gigantic districts of gas, for the most part hydrogen. This gas will begin to contract, and it warms up. As it gets, its temperature rises. At the point when the warmth gets sufficiently high, it causes the individual hydrogen iotas to impact and consolidate into helium with the arrival of vitality. This is called fusion.

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alexandr1967 [171]

Answer:

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5 0

2 years ago

If a planet has the same mass as the earth, but has twice the radius, how does the surface gravity, g, compare to g on the surfa

shepuryov [24]

Answer:

The surface gravity g of the planet is 1/4 of the surface gravity on earth.

Explanation:

Surface gravity is given by the following formula:

$g=G\frac{m}{r^{2}}$

So the gravity of both the earth and the planet is written in terms of their own radius, so we get:

$g_{E}=G\frac{m}{r_{E}^{2}}$

$g_{P}=G\frac{m}{r_{P}^{2}}$

The problem tells us the radius of the planet is twice that of the radius on earth, so:

$r_{P}=2r_{E}$

If we substituted that into the gravity of the planet equation we would end up with the following formula:

$g_{P}=G\frac{m}{(2r_{E})^{2}}$

Which yields:

$g_{P}=G\frac{m}{4r_{E}^{2}}$

So we can now compare the two gravities:

$\frac{g_{P}}{g_{E}}=\frac{G\frac{m}{4r_{E}^{2}}}{G\frac{m}{r_{E}^{2}}}$

When simplifying the ratio we end up with:

$\frac{g_{P}}{g_{E}}=\frac{1}{4}$

So the gravity acceleration on the surface of the planet is 1/4 of that on the surface of Earth.

3 0

2 years ago

A speaker vibrates at a frequency of 200 Hz. What is its period

Daniel [21]

Period, T = 1/ f.
f = frequency = 200 Hz.

Period T = 1/200 = 0.005 seconds.

8 0

2 years ago

What is efficiency?<br>

tatyana61 [14]

Explanation:

the state or quality of being efficient or able to accomplish something

5 0

2 years ago

A characteristic of matter that can be observed without changing the identity of the matter is a_______________.

ludmilkaskok [199]

Answer: A characteristic of matter that can be observed without changing the identity of the matter is a physical property.

Explanation:

A property that does not bring any change in chemical composition of a substance are known as physical properties.

For example, shape, size, mass, volume, density, etc of a substance are all physical properties.

Whereas a property that changes chemical composition of a substance is known as chemical property.

For example, precipitation, reactivity, toxicity etc are chemical property.

A chemical change cannot be reverted back.

Therefore, we can conclude that a characteristic of matter that can be observed without changing the identity of the matter is a physical property.

3 0

3 years ago