Posted by Daniel H on July 6, 2016, 2:16 pm, in reply to "Re: We got this much rain last night"
They didn't teach geometry in the second grade when I went to school, not that
it mattered, I failed high school math for the 3rd or 4th time in the 12th grade. Talk about not getting it, or not there. Lucky for us Google don't give a flying **** about how we did in school! I Found these instructions in about 2 minutes of Googling - convert glass of rain to inches of rain - http://scied.ucar.edu/blog/measuring-rainfall-%E2%80%93-it%E2%80%99s-easy-and-difficult-same-time-0 1 - Measure the diameter of the bucket at the level of the rain. Subtract out twice the thickness of the walls. - answer - 3 inches 2 - Measure the diameter of the bucket at the bottom in the same way. answer - 1.5 inches 3 - Calculate the average of the two diameters. - ####ers, I had to Google to find out how to find the average - "The mean is the average of the numbers. It is easy to calculate: add up all the numbers, then divide by how many numbers there are. In other words it is the sum divided by the count". So our math is 3 + 1.5 = 4.5 divide by 2 = answer - 2.25 inches 4 - Divide by two to find the average radius. - answer - 1.12 inches 5 - Find the average volume of rain = Depth x radius x radius x 3.14. Answer - 3.25 x 1.12 x 1.12 x 3.14 = 12.8 6 - Find the area at the top of the bucket (this is the area over which the rain is collected). a - Measure the diameter - 3 inches b - Divide the diameter by 2 to get the radius - answer - 1.5 c - Area = radius x radius x 3.14 - answer - 1.5 x 1.5 x 3.14 = 7.065 7 - Divide the rainfall volume by this area to get the rainfall. answer - 12.8 divided by 7.06 = 1.81 inches of rain (more or less). Feel free to check my math, if I am consistient there is an error in there somewhere. |
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