Because they are so far away that the distance has to be measured in light years. Each light year is around 10 trillion kilometers, which is a very large distance.
Explanation:
Centripetal force is mass times centripetal acceleration:
F = m v² / r
If force is doubled while mass and radius are held constant, then velocity will increase.
2F = m u² / r
2 m v² / r = m u² / r
2 v² = u²
u = v√2
So the velocity increases by a factor of √2.
The only condition under which a concave mirror forms a virtual and upright image on the principal axis is when there is a concave mirror with the object in front of the focal point. This is the only positioning available for the said image to be formed.
-- "Tesla" is a unit for the strength of a magnetic field.
The Earth's magnetic field at the surface ... the one that makes
compasses work ... averages roughly 45 microteslas.
So 1 Tesla = somewhere around 20,000 times the magnitude
of Earth's magnetic field at the surface.
There's a smaller, more convenient unit, called the 'Gauss'.
1 Tesla = 10,000 Gauss. The Earth's magnetic field ranges
between 0.25 to 0.65 Gauss at various places on the surface.
-- Newton is a unit of force, equal to about 3.6 ounces.
1 pound of force is about 4.45 newtons.
The statement that best describes the production of energy in the Sun is nuclei with less mass combine to form nuclei with more mass in the Sun’s core and release energy.
<h3>How is energy produced in the sun?</h3>
Sun is a major source of renewable energy to the Earth. This energy serves various purposes by living organisms.
However, the energy is generated as a result of nuclear fusion, which is the combination of smaller particles to form a larger one.
Therefore, the statement that best describes the production of energy in the Sun is nuclei with less mass combine to form nuclei with more mass in the Sun’s core and release energy.
Learn more about energy at: brainly.com/question/1932868
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