Question

If the average human life span were of the order ${{10}^{4}}$s, what would the revolution period of earth on this scale be?

Answer 1

We know that Earth spins around its axis, just as a top spins around its spindle. This spinning movement is called Earth's rotation. At the same time that the Earth spins on its axis, it also orbits, or revolves around the Sun. This movement is called revolution. Rotation refers to an object's spinning motion about its own axis. "Revolution" refers to the object's orbital motion around another object. For example, Earth rotates on its own axis, producing the 24-hour day. Earth revolves about the Sun, producing the 365-day year.

Complete step by step answer
It is known to us that the Earth's revolution not only affects but actually causes the temperature conditions that give us spring, summer, fall and winter seasons. Which season it is depends on whether you live in the Northern or Southern Hemisphere because the Earth's axis tilts toward one of the two as it moves around the sun. Effects of Earth's revolution include the seasons and variation in the length of days and nights. In addition to revolution, the tilt of Earth's axis relative to its plane of orbit has a profound effect on Earth. At almost any given time, one hemisphere is tilted toward the sun, as the other is tilted away.
The spinning of the earth on its axis causes days to turn into nights. A difference of one hour is created between two meridians which are 15 degrees apart. A change in the direction of wind and ocean currents. The rise and fall of tiredness every day.
We know that:
The revolution period of the earth is given by: ${{10}^{7}}$
The average human lifespan is given by: ${{10}^{9}}$
So, their ratio is given as: $\dfrac{{{10}^{7}}}{{{10}^{9}}}={{10}^{7}}\times {{10}^{-9}}={{10}^{-2}}$
According to the question we can write that:
${{10}^{-2}}\times {{10}^{4}}={{10}^{2}}$

So, the revolution period of the earth is ${{10}^{2}}$.

Note: Seasons are caused by the Earth's revolution around the Sun, as well as the tilt of the Earth on its axis. The hemisphere receiving the most direct sunlight experiences spring and summer, while the other experiences autumn and winter. During the cooler half, the Sun's rays aren't as strong and it's lower in the sky. If the Earth stopped spinning suddenly, the atmosphere would still be in motion with the Earth's original 1100 mile per hour rotation speed at the equator. This means rocks, topsoil, trees, buildings, your pet dog, and so on, would be swept away into the atmosphere.