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Old 05-10-2019, 03:43 PM
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Old 05-10-2019, 09:04 PM
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Originally Posted by olderguy
  • Coal has an energy density of around 30 MJ/kg on the high end (anthracite coal, enthalpy of combustion in a typical coal-burning environment)
  • 170 tons of coal is 154,221kg
  • Burning all that coal would release 4,626,630MJ of thermal energy
  • A 2MW wind turbine takes 2,313,315 seconds to produce this much energy
  • This seems like a lot, but is actually just under 27 days!
Granted, it is simplistic to compare burning the coal to using it in steelmaking. The coking coal is not all burned. There are inefficiencies in the production, refinement, and transportation of metallurgical coal and raw materials. But since no currently economically viable bulk fossil fuels (coal, fuel oil, CNG) require more energy to produce than their enthalpy of combustion, it's a fine thing to do to look at the energy in the coal that's used and think that quantity of coal as a fuel, if only to get a ballpark estimate that is within an order of magnitude. Even if it takes 100 times the energy to make the windmill as burning all the coal used in the production of the steel used in its construction, it will still only take 10 years to pay that energy back, which is significantly less than the service life of any commercial generating technology.

TLDR: I don't think that this Thomas Homer-Dixon guy did a whole lot of math when coming up with these claims.
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Old 05-10-2019, 09:36 PM
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Do not fact check infographics which you see online. If they reinforce your beliefs, then just accept them as truth. If you do not, then the Other Side will win.
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Old 05-10-2019, 10:14 PM
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Originally Posted by afm
  • Coal has an energy density of around 30 MJ/kg on the high end (anthracite coal, enthalpy of combustion in a typical coal-burning environment)
  • 170 tons of coal is 154,221kg
  • Burning all that coal would release 4,626,630MJ of thermal energy
  • A 2MW wind turbine takes 2,313,315 seconds to produce this much energy
  • This seems like a lot, but is actually just under 27 days!
Granted, it is simplistic to compare burning the coal to using it in steelmaking. The coking coal is not all burned. There are inefficiencies in the production, refinement, and transportation of metallurgical coal and raw materials. But since no currently economically viable bulk fossil fuels (coal, fuel oil, CNG) require more energy to produce than their enthalpy of combustion, it's a fine thing to do to look at the energy in the coal that's used and think that quantity of coal as a fuel, if only to get a ballpark estimate that is within an order of magnitude. Even if it takes 100 times the energy to make the windmill as burning all the coal used in the production of the steel used in its construction, it will still only take 10 years to pay that energy back, which is significantly less than the service life of any commercial generating technology.

TLDR: I don't think that this Thomas Homer-Dixon guy did a whole lot of math when coming up with these claims.
Yeah, but what about her emails?
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Old 05-10-2019, 10:58 PM
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Originally Posted by concealer404
Yeah, but what about her emails?
Nice bit of sleuthing.

Anecdotally, I remember driving to the Southern tip of Hawaii island where the trade winds blow constantly. An abandoned wind farm sits there, most not turning and some toppled over. I always wondered why this was the case. My guesses were a) too much wind or b) the cost of operation didn't outweigh the profit made generating power.
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Old 05-11-2019, 08:29 AM
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Old 05-11-2019, 08:48 AM
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lol. so insane.


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Old 05-12-2019, 03:00 PM
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sorry JoeP.

Last edited by Braineack; 05-12-2019 at 03:31 PM.
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Old 05-12-2019, 03:19 PM
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Originally Posted by Braineack
sorry JoeP.
Why? I'm all for nutjobs gong on sex-strike. It decreases uncertainty and reduces risk in the decision-making process.
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Old 05-12-2019, 03:26 PM
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13:52

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Old 05-12-2019, 03:38 PM
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Originally Posted by Braineack
(Police wading into a situation filled with superior numbers of belligerent hostiles.)







(Also, not sure what the 13:52 means.)
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Old 05-12-2019, 03:40 PM
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https://www.urbandictionary.com/define.php?term=1350
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Old 05-12-2019, 03:57 PM
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I was not aware that police constituted 13% of the population of the united States.


Did some research. Estimates I've found range from around 481,000 officers (source) to over 900,000 officers (source) in the US. Taking an average of the high and low figures, that's 0.2% of the total population, and around 0.43% of the active labor force.

If 0.2% of the population are committing 50-52% of the crimes, then that's just an unimaginably staggering figure. I can totally understand your hatred for the police.
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Old 05-13-2019, 11:26 AM
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(K.R.) SUPREME COURT RULES ANTITRUST LAWSUIT OVER APPLE’S APP STORE CAN PROCEED

The Supreme Court this morning has ruled that con-sumers can pro-ceed with an an-titrust law-suit accusing Apple of monopolizing the market for iPhone software applications and forcing them to overpay.

Apple requires apps to be sold through its App Store, and charges developers a $99 annual membership fee plus a 30% commission on every app sale.

The lawsuit alleges that apps would be cheaper if software developers could sell them directly and bypass Apple as a middleman.

The ruling didn’t address the merits of the plaintiffs’ claims, but instead focused on whether consumers had a right to sue Apple over these practices. The court, in a 5-4 opinion by Justice Brett Kavanaugh, said they did. Justices Gorsuch, Thomas, Roberts, and Alito dissented.

The case itself could take one to two years, if not longer, to resolve.

...
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Old 05-13-2019, 11:28 AM
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this is how more news interviews should go.

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Old 05-13-2019, 11:33 AM
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Old 05-13-2019, 12:34 PM
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Originally Posted by Braineack
this is how more news interviews should go.

I find that many British politicians far far better orators than ours. I'm certain that it is because our best and brightest avoid being politicians.
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Old 05-13-2019, 01:58 PM
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Presents For the New Royal Baby




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Old 05-13-2019, 05:08 PM
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I
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Old 05-15-2019, 08:47 AM
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