Final answer:
The highest altitude the sun would reach in the sky can be calculated by considering the season and latitude. For example, on December 21 at a place on the Tropic of Cancer (latitude 23° N), the sun would be at an altitude of 44°.
Step-by-step explanation:
To calculate the highest altitude the sun would reach in the sky, you need to consider the season and latitude. The sun's highest altitude occurs during mid-summer and is lowest during mid-winter. The altitude can be calculated using the difference in declination between the zenith and the position of the sun. For example, on December 21 at a place on the Tropic of Cancer (latitude 23° N), the sun would be at an altitude of 44°.