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Jaglover
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Muso
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 Posted: Wed Jan 17, 2018 7:32 pm Post subject: |
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MAGIC!
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Koala Kid
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| Posted: Wed Jan 17, 2018 8:35 pm Post subject: |
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The joke is on you, global warming tweaked mercury's freezing point.
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aidanjt
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| Posted: Wed Jan 17, 2018 9:47 pm Post subject: |
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Perhaps the tube was under partial vacuum. I don't know the pressure curve for mercury's melting point, so I'm not sure, it might hit its triple point before hitting -50°F.
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| juniper wrote: | | you experience political reality dilation when travelling at american political speeds. it's in einstein's formulas. it's not their fault. |
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cokey
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| Posted: Wed Jan 17, 2018 11:04 pm Post subject: |
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Can someone put this into normal language please. No-one know what 'F is these days.
Or is this one of those threads where retards go "today wasn't as hot as 1975, global warming is a myth..."
It's a fact, we're causing it. Get over it
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Muso
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| Posted: Wed Jan 17, 2018 11:11 pm Post subject: |
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| cokey wrote: | | Can someone put this into normal language please. No-one know what 'F is these days. |
| Jaglover wrote: | | According to AP there was a mercury thermometer set up to measure up to -50 degrees. For people who didn't drop out from middle school mercury freezes at -38 °F (-39 °C), from there it won't drop anywhere. |
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ian.au
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| Posted: Wed Jan 17, 2018 11:36 pm Post subject: |
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| Muso wrote: | | cokey wrote: | | Can someone put this into normal language please. No-one know what 'F is these days. |
| Jaglover wrote: | | According to AP there was a mercury thermometer set up to measure up to -50 degrees. For people who didn't finish middle school; mercury freezes at -38 °F (-39 °C), from there it won't drop anywhere. |
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Fixed for those who did  |
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Akkara
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| Posted: Thu Jan 18, 2018 1:05 am Post subject: |
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| cokey wrote: | | Can someone put this into normal language please. No-one know what 'F is these days. |
It is real easy: -40 °C and -40 °F are the same temperature.
From there, °F goes up 1.8 degrees per °C. Conversely (reciprocalversly?) °C goes up 1/1.8 == 5/9 degree per °C. Near -40 you can approximate 1.8 as 2, so -39°F is about -39.5°C
From this you can derive a nice symmetric and easy-to-remember conversion. Much nicer, in my opinion, than the "+/- 32" one that's taught in school.°F = (9/5) * (°C + 40) - 40
°C = (5/9) * (°F + 40) - 40
Similar patterns (but not as nice) also apply for other temperatures where °C and °F have a simple relation. For everyday temperatures, pick one or two of these "landmarks" to remember:10 °C == 50 °F
20 °C == 68 °F
25 °C == 77 °F
30 °C == 86 °F
40 °C == 104 °F
50 °C == 122 °F Then apply them to a modified formula, as in this example:°F = (9/5) * (°C - 20) + 68
°C = (5/9) * (°F - 68) + 20
As before, for temperatures around the "pivot", approximate the (9/5) as 2 (and the 5/9 as 1/2) to get a fast estimate of temperature in the other system. With a bit of practice it's not hard to do these in your head, in realtime during a conversation.
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