They relate because the freezing of the water or the melting of the snowball are both a matter of transferring energy.
And yes, in our post-mortem of that exam, those who did not see past the red herring brought up the friction factor, as I recall the correct speed was right up there. The teacher reminded us that this was high school physics. And now I think of it, he worded the question so that the mass of the snowball was 500g at the moment it hit the wall, taking out the friction factor. But it would have made no difference, either, how densely the snowball was packed. A gram of water is a gram of water.
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Today's Featured Article - An Old-Time Tractor Demonstration - by Kim Pratt. Sam was born in rural Kansas in 1926. His dad was a hard-working farmer and the children worked hard everyday to help ends meet. In the rural area he grew up in, the highlight of the week was Saturday when many people took a break from their work to go to town. It was on one such Saturday in the early 1940's when Sam was 16 years old that he ended up in Dennison, Kansas to watch a demonstration of a new tractor being put on by a local dealer. It was an Allis-Chalmers tractor dealership,
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