Edited BY: Helen Wolfson
Edit Date: 2016-05-12 16:22:55

In the summer time, most of the people like spending time to the beach. At the beach, the cool water is much more inviting than the hot sand, even though the sun warmed them both up since the morning.

The video might help to answer the following question.

In order to raise the temperature of the sand and water to the same level, where should one invest more energy?

Question Created By: haya zinno birk
Creation Date: 2016-05-01 14:20:41
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