Hello, I'm a geophysicist with a strong interest in the Earth's rotation and its effects on various natural phenomena. When it comes to the Earth's rotation, it's important to understand that the speed at which the Earth rotates is not constant throughout the day. However, on average, the Earth rotates at a speed of approximately 1670 kilometers per hour (1037 miles per hour) at the equator.

To calculate how much the Earth rotates in one hour, we can use the following simplified calculation:

1. The Earth completes one full rotation (360 degrees) approximately every 24 hours.
2. To find out how much the Earth rotates in one hour, we divide the total rotation by the number of hours in a day.

So, the calculation would be:

\[ \text{Rotation per hour} = \frac{\text{Total rotation in a day}}{\text{Number of hours in a day}} \]

\[ \text{Rotation per hour} = \frac{360^\circ}{24 \text{ hours}} \]

\[ \text{Rotation per hour} = 15^\circ \text{ per hour} \]

This means that on average, the Earth rotates about 15 degrees per hour.

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But we can also measure the angular speed of rotation. 360 degrees/24 hr = 15 degrees per hour. The sun subtends is 1/2 degree how long does it take for the sun to move through an angle equal to its angular diameter? 1/2 degree/15 degrees/hr = 1/30 hr = 2 minutes.read more >>