Time taken for Earth to turn 15 degrees of longitudinal distance
The Earth takes approximately 24 hours to complete one full rotation on its axis. This means that it turns 360 degrees in 24 hours, or 15 degrees every hour. Therefore, to turn 15 degrees of longitudinal distance, the Earth takes 1 hour.

Factors affecting the time taken
- Size of the Earth: The larger the planet, the longer it takes to rotate. Earth's rotation period is about 24 hours, while smaller planets like Mars have a rotation period of around 24.6 hours.
- Latitude: The Earth rotates at different speeds depending on the latitude. At the poles, the rotation rate is almost zero, while at the equator, it is the fastest.
- Axial tilt: The Earth's axis is tilted at an angle of about 23.5 degrees. This tilt causes variations in the length of days throughout the year.

Implications of Earth's rotation
- Day and night cycle: The rotation of the Earth causes the cycle of day and night. As different parts of the Earth face the Sun, it creates the illusion of the Sun rising and setting.
- Coriolis effect: The rotation of the Earth creates the Coriolis effect, which influences the direction of winds and ocean currents.
- Time zones: The Earth's rotation is the basis for dividing the world into different time zones. Each time zone is approximately 15 degrees of longitude wide, corresponding to one hour of time difference.
In conclusion, the Earth takes approximately 1 hour to turn 15 degrees of longitudinal distance due to its rotation on its axis.