love2scoobysnack wrote:

KarrothMelu wrote:Heat up the water first. Water freezes faster if it's cooled from a higher temp.

Karroth you fail. While you do remove more energy faster to start once you reach the same temp as the brother's water was when put into the freezer it will proceed to cool at the same rate as the brother's water did when first placed in the freezer however, a few hours (give or take) have passed in which the brother's water has already frozen.

there are so many ways to do this and salt in the brother's water would work however, that seems like cheating. So Jim needs to place ice cubes into his water which had previously been made from water which came out of the kitchen tap. This is not cheating because the rules do not stipulate that Jim can't freeze more than 5 ounces of water only that he must freeze the 5.

Edit:

Karroth is still wrong even though he got the point because by warming the water mare will evaporate and there will no longer be the required 5 ounces of water frozen, also due to the time required to heat the water, adjust the freezer to the proper temperature, and remove any impurities from the tap water what would affect his plan, Ben has enough time to look up what he is doing and just before the water goes in the freezer he hands his brother a lid to put on his container totally screwing him over.

Also Karroth still looses because he did not explain the complete how and because I am bitter that they never covered any principles of convection in my physics classes.