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05-16-2018, 10:52 AM | #1 | |
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Basic Physics
I went on a Wikipedia binge, and wound up reading about Pulsars. According to Wikipedia:
Quote:
I shared this on Facebook, because it's fucking nuts to think about, but one of my friends said that the math seemed wrong, and that the proper answer was 1/8 the speed of light; not 1/4. So I did the math myself and I got... the same answer he got. Are we missing something obvious? I did some more Googling and everyone has 25% listed, so I'm thinking either we are doing something dumb, or everyone else is copy-pasting from the same, mistaken source. Our math: Diameter = 16,000 meters RPS = 716 Speed of Light = 299792458 m/s (16000)*(pi) = 50265m (50265)*(716) = 35990000m/s 299792458/35990000 = ~1/8 = ~ 12% the speed of light, not 24%. What are we missing?
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05-16-2018, 11:05 AM | #2 |
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Isn't Wikipedia possible to edit for anybody? Why not just change it to the answer you think it is?
Edit: Nevermind, I just changed it for you. |
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05-16-2018, 11:36 AM | #3 | |
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Quote:
https://en.wikipedia.org/w/index.php...ldid=819250061 |
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05-16-2018, 11:51 AM | #4 |
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Lol, I was gonna, but wanted to make sure I wasn't being a stupid first!
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05-16-2018, 12:00 PM | #5 |
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You didn't include the perceived speed increases of using a lightweight pulley.
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05-16-2018, 12:16 PM | #7 |
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We can call in the expert. Probably the same guy that enters the wrong stuff in Wiki to start with though. Does Wiki qualify as a "Scientific Journal"?
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05-16-2018, 12:37 PM | #8 |
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Sorry guys, but you are wrong. You mixed up radius and diameter.
The circumference is pi*D = 2*pi*R. You used the D in your equation but the article quoted the radius as 16,000 m, not the diameter. I'm surprised @Tcoat didn't catch this. |
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05-16-2018, 12:45 PM | #9 | |
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Quote:
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05-16-2018, 12:57 PM | #10 |
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I should make this my avatar.
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05-16-2018, 01:10 PM | #11 |
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Science is fun!
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05-16-2018, 01:16 PM | #12 |
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Okay boys... change it back. Hahaha
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05-16-2018, 01:22 PM | #13 |
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LOL
And THAT is why you don't trust Wikipedia!
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05-16-2018, 02:12 PM | #14 |
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