How does the mass of and distance between the Sun and the Earth impact the number of days in a year?

Physics

1 answer:

Alexxandr [17]2 years ago

6 0

Answer:

Force of sun on earth can be written:

F = G M m / R^2

Centripetal force on earth can be written:

F= m w^2 R

Equating these:

G M / R^2 = w^2 R

Or w^2 = G (M / R^3)

Since no/ days per year is proportional to w (time for 1 revolution)

Increasing M (mass of sun) would increase w or decrease length of year

Increasing the mean radius R would decrease w or increase length of year

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Approximately what core temperature is required before hydrogen fusion can begin in a star?

valkas [14]

Answer:

The temperature required is near about 3 million kelvin

Explanation:

The brilliance of the star results from the nuclear reaction that take place in the core of the star and radiate a huge amount of thermal energy resulting from the fusion of hydrogen into helium.

For this reaction to take place, the temperature of the star's core must be near about 3 million kelvin.

The hydrogen atoms collide and starts and the energy from the collision results in the heating of the gas cloud. As the temperature comes to near about $1.5\times 10^{7 {\circ}C$ , the nuclear fusion reaction takes place in the core of the gas cloud.