Thought for the day...

spinnaker

Joined Oct 29, 2009
7,830
I'd call it an aggressive promotion

Not really. You just need to be in the vicinity of a McDonalds to get the deal. It is a way to promote their on line ordering app.

Burger King and Mcdonalds are 2-3 miles apart in my area. From my house they are equidistant. I will likely not be taking them up on this deal as it is not worth the extra drive. Plus I detest the online ordering apps.
 

wayneh

Joined Sep 9, 2010
18,108
Not really. You just need to be in the vicinity of a McDonalds to get the deal. It is a way to promote their on line ordering app.

Burger King and Mcdonalds are 2-3 miles apart in my area. From my house they are equidistant. I will likely not be taking them up on this deal as it is not worth the extra drive. Plus I detest the online ordering apps.
Our local pair are across the street from each other, so I might give it a try. I’ve had zero success with online ordering at McDonalds, so I won’t hold my breath that BK will be any better.
 

cmartinez

Joined Jan 17, 2007
8,768
Fluoride rechargeable batteries:


"Fluoride batteries can have a higher energy density, which means that they may last longer -- up to eight times longer than batteries in use today," says study co-author Robert Grubbs, Caltech's Victor and Elizabeth Atkins Professor of Chemistry and a winner of the 2005 Nobel Prize in Chemistry. "But fluoride can be challenging to work with, in particular because it's so corrosive and reactive."
 

cmartinez

Joined Jan 17, 2007
8,768
Just how long do you think it will take people to modify these batteries into something dangerous?

"Fluorine the Gas of Lucifer." makes a great charcoal lighter.


I'm sure most things can be modified/tweaked into something dangerous. Fertilizer and household cleaning products come to mind. The question would be how easily this technology could be used for evil... a plain old truck loaded with a large gasoline (or LP gas) container is dangerous enough, and yet, they're not hard to set up.
 

nsaspook

Joined Aug 27, 2009
16,330
I'm sure most things can be modified/tweaked into something dangerous. Fertilizer and household cleaning products come to mind. The question would be how easily this technology could be used for evil... a plain old truck loaded with a large gasoline (or LP gas) container is dangerous enough, and yet, they're not hard to set up.
This is correct but reactive Florine compounds are potentially dangerous in very small quantities. In a battery, energetic reactions are advantageous to energy density. You don't get 8X higher energy density by being less volatile at some point in the ion exchange process.
 

nsaspook

Joined Aug 27, 2009
16,330
https://www.nbc15.com/content/news/...ns-chocolate-milk-back-on-menu-502116431.html

chocolate milk back on menu

The U.S. school lunch program is making room on menus again for noodles, biscuits, tortillas and other foods made mostly of refined grains.
...
Low-fat chocolate milk will also be allowed again. Previously, only fat-free milk could be flavored, although that rule had also been temporarily waived. A final goal for limiting sodium will be scrapped as well, but schools will still be required to meet reduced sodium targets.
 

nsaspook

Joined Aug 27, 2009
16,330
Interesting. From the abstract: hole mobility (a measure of ease of carrier drift) is pretty low at 2.0 cm2/Vs compared to ~1,400 cm2/Vs in undoped silicon. I'm sure it works as a transistor or solid-state sensor but the speed/sensitivity potential might be limited much like how typical PNP transistors are slower than the same class NPN transistor because of lower mobility.
 
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