Answer:
Nuclear fusion and gravitational contraction
Explanation:
In stars, there is an equilibrium between two forces, the force of gravity in the inward direction due to their own mass, and the radiation pressure in the upward direction as a consequence of the nuclear reaction in their core, that is known as hydrostatic equilibrium.
The radiation pressure is gotten from the nuclear reactions at the core (when lighter elements fuse into heavier elements), but if the nuclear reactions stop, hence, the radiation pressure will also do it and the force of gravity will overcome and break the equilibrium.
Both of that energy sources help to maintain a star's internal thermal pressure, since the contractions of the superficial layers will increase the density at the core.
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Description
In classical mechanics, impulse is the integral of a force, F, over the time interval, t, for which it acts. Since force is a vector quantity, impulse is also a vector quantity. Impulse applied to an object produces an equivalent vector change in its linear momentum, also in the resultant direction.
Answer:
Aluminum has the highest atomic number
<span>For the inhabitants that have lived there since before human development on Earth began, the problems posed by cooler temperatures and smaller oceans has led them to develop great intellectual powers, in order to meet the needs of the moment. When they turn their newly created instruments towards Earth, 35,000,000 miles away, they see a way to survive</span>
is the best estimate of the density of the air on the planet.
Given:
The mass of the conical flask with stopper is 457.23 grams and the volume is
.
Mass of conical flask and a stopper after removing the air is 456.43 g
To find:
The density of the air on the planet.
Solution;
Mass of the conical flask and stopper with air on the planet= 457.23 g
Mass of conical flask with a stopper and without air on the planet = 456.43 g
Mass of the air in the conical flask on the planet =m
![m = 457.23 g-456.43 g=0.8 g\\\\1 g = 0.001 kg\\\\m =0.8 g =0.8\times 0.001 kg=0.0008 kg](https://tex.z-dn.net/?f=m%20%3D%20457.23%20g-456.43%20g%3D0.8%20g%5C%5C%5C%5C1%20g%20%3D%200.001%20kg%5C%5C%5C%5Cm%20%3D0.8%20g%20%3D0.8%5Ctimes%200.001%20kg%3D0.0008%20kg)
The volume of the conical flask = ![500 cm^3](https://tex.z-dn.net/?f=500%20cm%5E3)
The volume of the air in the conical flask = ![V = 500cm^3](https://tex.z-dn.net/?f=V%20%3D%20500cm%5E3)
![1 cm^3=10^{-6} m^3\\\\V= 500cm^3= 500\times 10^{-6}m^3=0.0005 m^3](https://tex.z-dn.net/?f=1%20cm%5E3%3D10%5E%7B-6%7D%20m%5E3%5C%5C%5C%5CV%3D%20500cm%5E3%3D%20500%5Ctimes%2010%5E%7B-6%7Dm%5E3%3D0.0005%20m%5E3)
The density of the air on the planet = d
![d=\frac{m}{V}\\\\d=\frac{0.0008 kg}{0.0005 m^3}\\\\=1.6 kg/m^3](https://tex.z-dn.net/?f=d%3D%5Cfrac%7Bm%7D%7BV%7D%5C%5C%5C%5Cd%3D%5Cfrac%7B0.0008%20kg%7D%7B0.0005%20m%5E3%7D%5C%5C%5C%5C%3D1.6%20kg%2Fm%5E3)
is the best estimate of the density of the air on the planet.
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