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We've improved Slashdot's video section; now you can view our video interviews, product close-ups and site visits with all the usual Slashdot options to comment, share, etc. No more walled garden! It's a work in progress -- we hope you'll check it out (Learn more about the recent updates).

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Comment: Re:and yet NYC still has traffic jams (Score 1) 882

by sir99 (#28876647) Attached to: Rude Drivers Reduce Traffic Jams
Your father probably could have beat that ticket. PA Title 75, 3368(c)(4) says,

No person may be convicted upon evidence obtained through the use of devices authorized by paragraphs (2) and (3) unless the speed recorded is six or more miles per hour in excess of the legal speed limit. Furthermore, no person may be convicted upon evidence obtained through the use of devices authorized by paragraph (3) in an area where the legal speed limit is less than 55 miles per hour if the speed recorded is less than ten miles per hour in excess of the legal speed limit. This paragraph shall not apply to evidence obtained through the use of devices authorized by paragraph (2) or (3) within a school zone or an active work zone.

Paragraph (2) refers to radar, and paragraph (3) refers to timing a car between two points. Strangely, this doesn't seem to cover a cop pacing you and looking at his speedometer. Also, I think that if you admit to speeding, you can still be convicted regardless of the above.

Comment: Re:Harshness is all about color temperature (Score 2, Interesting) 859

by sir99 (#27513823) Attached to: CFLs Causing Utility Woes
According to Wikipedia, heat pumps are often 300-400% efficient, compared to 100% for resistive heating. This means that a heat pump could add 3-4 Joules of heat to your house while only taking 1 Joule of electric energy from the grid (most of the heat comes from the outside air, the rest from resistive heating, etc.).

OTOH, a resistive heater adds 1 Joule of heat by consuming 1 Joule from the grid (minus a smidge lost in your outside wiring).

"What is wanted is not the will to believe, but the will to find out, which is the exact opposite." -- Bertrand Russell, _Sceptical_Essays_, 1928

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