Comment on Gravity Light - Alternative form of lighting to replace KeroseneparentComments−ChuckMcM13yLine three: you write Energy stored E = mgh (300 J) but by substitution Energy stored E = 10 (kg) (9.8 m/sec) 3 (meters) 2940 J 2940/1800 is 1.6W−pdonis13yCheck your math. I used 10 instead of 9.8 for g since I was just doing a "back of the envelope" calculation. 10 x 10 x 3 = 300.−ChuckMcM13ysigh, you are absolutely correct. The rounding up messed with my brain I saw the 300 and thought "oh that is just 10 * 3 (brain fart) he didn't add in the 9.8"AND I have to correct mine too since I used 180 for time (30 * 6 rather than 30 * 60)
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Line three: you write
but by substitution 2940/1800 is 1.6WCheck your math. I used 10 instead of 9.8 for g since I was just doing a "back of the envelope" calculation. 10 x 10 x 3 = 300.
sigh, you are absolutely correct. The rounding up messed with my brain I saw the 300 and thought "oh that is just 10 * 3 (brain fart) he didn't add in the 9.8"
AND I have to correct mine too since I used 180 for time (30 * 6 rather than 30 * 60)