Want to read Slashdot from your mobile device? Point it at m.slashdot.org and keep reading!


Forgot your password?

Feds Say It's Time To Cut Back On Fluoride In Drinking Water 314

Posted by timothy
from the my-amount-of-fluoride-right-or-wrong-but-my-amount-of-fluoride dept.
An anonymous reader writes: Federal health officials Monday changed the recommended amount of fluoride in drinking water for the first time since 1962, cutting by almost half the maximum amount of fluoride that should be added to drinking supplies. The Department of Health and Human Services recommended 0.7 milligrams of fluoride per liter of water instead of the long-standing range of 0.7 to 1.2 milligrams. The change is recommended because now Americans have access to more sources of fluoride, such as toothpaste and mouth rinses, than they did when fluoridation was first introduced in the United States,' Dr. Boris Lushniak, the deputy surgeon general, told reporters during a conference call.

Comment: Re:Slow (Score 3, Insightful) 106

by almitydave (#49394403) Attached to: World's First 1 Megawatt All-Electric Race Car

So? It's not an oval racer. It's built to a performance envelope defined by a specific event. The factors that are important here are acceleration, downforce, and mechanical grip; not top speed. Looking at the sketch in TFA, it's clear by the presence of the front wing that they're targeting massive downforce, which eats into top speed by creating drag.

Comment: Re:3 Minutes (Score 4, Insightful) 106

by almitydave (#49394207) Attached to: World's First 1 Megawatt All-Electric Race Car

with 1MW power, the 50KWh battery would be dead in 3 minutes at full throttle.. jeez.
Roughly equivalent to a gasoline car with a 2-gallon tank... lol. (1 gal=33KWh)

Do all these people posting 50kWh/1020kW 180s comments not understand racing? Or hybrid drive systems? Or Mountain roads? As TFA mentions, the Pikes Peak course contains over 150 turns, so you'll be off throttle or at partial throttle most of the time, especially with that much torque available, and regenerative braking will give some of it back.

Or perhaps the race car engineers that are building the race car don't know anything about the race they're building it for. That seems likely. /sarcasm

Comment: Re:Why is bitcoin popular again? (Score 1) 254

by almitydave (#49286435) Attached to: Evolution Market's Admins Are Gone, Along With $12M In Bitcoin

This is not entirely true, in the United States banks under the FDIC coverage only insure you to a max of $250.000 regardless of how much money you have in your bank account, while C
oinbase for example gives you insurance for the full amount of your bitcoins

Which is why everyone who wants to keep more than that in the bank divides it into multiple accounts, since each account is insured to $250k, not each person.

"In the face of entropy and nothingness, you kind of have to pretend it's not there if you want to keep writing good code." -- Karl Lehenbauer