Every 24 hours, Earth makes a full rotation around its axis. Earth's speed of rotation at the equator is 1,670 km per hour. What is the circumference of Earth's equator?
1670 km/hr * 24hr = 40080km
To find the circumference of Earth's equator, we need to use the formula:
Circumference = 2 * π * radius
First, we need to find the radius of the Earth. Since we know the speed of rotation at the equator, we can use this information to calculate it. The Earth completes one full rotation in 24 hours, which means its speed of rotation is equivalent to the circumference of the Earth's equator.
Let's calculate the radius of the Earth by using the formula:
Radius = Speed / (2 * π)
Given:
Speed = 1,670 km/hour
Radius = 1,670 km/hour / (2 * π)
Simplifying further:
Radius ≈ 1,670 km/hour / (6.28)
Radius ≈ 265.92 km
Now that we have the radius of the Earth, we can calculate the circumference using the formula mentioned earlier:
Circumference = 2 * π * radius
Circumference ≈ 2 * 3.14 * 265.92 km
Circumference ≈ 1,675.52 km
Therefore, the approximate circumference of Earth's equator is 1,675.52 km.