This is an improved version of the activity The Power of the Sun. Ii is an excellent problem in the topic of energy. The problem is the following: A physics student wants to estimate the power of the Sun. During that time in the year and also in the day when light rays from the Sun are the most intense, she found that in a 7-hour period, the temperature of the water in a pool increased 1.6º C. The pool is 22 m long, 12 m wide, and 1.8 m in depth. She investigated that only 50% of the sunlight