The total amount of mass in the Sun is 2.0 x 10^30 kg, 5% of whig is hydrogen, and 13% of which becomes available for fusion. Thus, the total mass of hydrogen available for fusion over the Sun's lifetime is simply 13% of 75% of the total mass of the Sun or:
2.0 x 10^30 kg x .75 x .13
=<u> 1.95 x 10^29 kg</u>
<u />
Nuclear fusion occurs only in the core of the sun where temperature pressure and density are highest. The photosphere can be seen with visible light telescopes, the chromosphere with ultraviolet telescopes, and the corona most easily with X-ray telescopes.
The Sun is a typical star and also the closest star to the Earth. It is composed of 73% hydrogen, 25% helium, and 2% other elements. Since the gravitational pull of the sun on the earth is the centripetal force that causes the earth to move in a circular motion around the sun, we can use Newton's law of universal gravitation to find the mass of the sun without visiting it.
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Convection. As the water molecules are being heated up at bottom, the molecules with less heat energy then move to take their place. By doing this all the water should reach an equal temperature.
500 N is the answer, you just tell that the moon is attracted towards the person because of the Earth's huge mass.
Answer:
The speed needed to escape from the solar system starting from the surface of Neptune is approximately 23557.615 meters per second.
Explanation:
The escape speed needed to escape from the gravitational influence of a planet (
), measured in meters per second, is derived from Newton's Law of Gravitation and Principle of Energy Conservation and defined by the following formula:
(1)
Where:
- Gravitational constant, measured in cubic meters per kilogram-square second.
- Mass of Neptune, measured in kilograms.
- Radius from the center to surface, measured in kilograms.
If we know that 
, 
and 
, then the escape speed needed is:
The speed needed to escape from the solar system starting from the surface of Neptune is approximately 23557.615 meters per second.
