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3 years ago

Nuclear fusion within the sun takes place within the

Physics

1 answer:

Marina86 [1]3 years ago

3 0

Answer:

Within the core

Explanation:

The core of the sun (and of every star) is the central part of the star, the hottest one.

Its temperature is about 10 million Kelvin degrees and more - and this temperature is enough to allow the nuclei of hydrogen to overcome the electrostatic repulsion between each other and come close enough to initiate the nuclear fusion.

The nuclear fusion is the process that produces energy in a star: in a nuclear fusion reaction, the nuclei of hydrogen fuse together to form nuclei of helium, and since the mass of the final products is less than the mass of the initial products, part of the mass is converted into energy, according to Einstein's famous equation

$E=mc^2$

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A particle moves along a horizontal path. Its position in meters after t seconds is given by: s(t) = t 3 − 12t + 3. Answer the f

sineoko [7]

Answer:

(a) velocity function: 3t² - 12

(b) acceleration function: 6t

(d) the particle is moving backward when t < 2

(e) the particle travels -9 m

Explanation:

position: s(t) = t³ − 12t + 3.

(a) by definition, velocity = ds/dt = 3t² - 12

(b) by definition, acceleration = d²s/dt² = 6t

3t² - 12 > 0

3t² > 12

t² > 12/3

t² > 4

t > 2

(d) A particle moves backwards when its velocity is negative. That is:

3t² - 12 < 0

3t² < 12

t² < 12/3

t² < 4

t < 2

(e) The distance is computed as follows:

$\int_{0}^{3} v(t) dt$

$\int_{0}^{3} 3t^2 - 12 dt$

$3^3 - 12(3) - [ 0^3 - 12(0) ]$

-9

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3 years ago

We can always determine the recession velocity of a galaxy (at least in principle) from its redshift. but before we can use hubb

pychu [463]

Measuring the distance to many distant galaxy with a standard candle technique.

Hubble presented the observational evidence for one of science’s greatest discoveries—the expanding universe. Hubble showed that galaxies are receding away from us with a velocity that is proportional to their distance from us: more distant galaxies recede faster than nearby galaxies.

A redshift is an increase in the wavelength, and corresponding decrease in the frequency and photon energy, of electromagnetic radiation.

The standard candle technique is particularly valuable when studying very distant objects. Eventually, the effects of parallax stop working because things get too far away. However, since a standard candle depends on the inverse square law, it can reach much further as a result.

As long as we have instruments that can detect a standard candle and measure its brightness, it can be used to measure a distance.

therefore before measuring the recission velocity one must use standard candle technique to eliminate any parallax

learn more about parallax here:

brainly.com/question/1394541

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2 years ago

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geniusboy [140]

Answer:

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Explanation:

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3 years ago

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When cleaning up a local beach, students found many different particles that were in the water that affected the shoreline, like

Wewaii [24]

The correct answer is D,

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Strip electrons from an atom and the atom becomes a

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It becomes a positive Iron