There comes a time in a product's life when it just isn't worth keeping it. Our old rain gauge has seen it's last rainy season. If you click on the picture and look at a magnified view of the old rain gauge (on the left) you will see that the plastic is barely transparent now. This made it really difficult to see how much rain had fallen even if we put coloring in the water.
And speaking of visibility, the old gauge used the top of the rain collected as the measuring line and an inch of rain meant pretty close to an inch of water in the gauge. The new gauge has an orange float that will rise with the water. Also, the top is like a magnifying glass in that water which falls inside a collecting funnel 96 mm in diameter but then drops into a tube considerably smaller. Since the tube is 46 mm in diameter, an inch of rain doesn't raise the float by just 1 inch. It raises it by more than 4 times 1 inch. Can you figure out exactly how many inches it would raise?
You include physics problems in your blog now?!!? Anyway, it's not that much more than 4 inches, but I'll let others ponder it.
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