Rhenic
Rhenic t1_iv56ykh wrote
Reply to comment by HW90 in [OC] How long headphones last and where they fail by madredditscientist
It's also trivially easy to just replace the padding; Bought some $2 replacements that made my previous headphones last another 3 years.
Rhenic t1_iuty56f wrote
Reply to comment by projecthouse in 30 minutes of car preheating in sub-zero conditions produces as much particulate emissions as driving 97km in a gasoline car, or 20km in a diesel car “These findings do not suggest to stop preheating cars; instead, we could reduce the emissions by using similar methods that are in place for engine” by giuliomagnifico
Even to that sounds counterintuitive, it's not impossible!
First off; It's about particulate emissions, not carbon. Incomplete/inefficient combustion produces much more particulate (think of a fire smoking badly when it's not getting enough oxygen, the smoke consists of particulate).
Engines tend to produce much more particulate as well when not running without a proper load, at an efficient RPM, just like a badly burning fire.
Then the devices that are tasked with catching and nullifying that particulate (like the catalytic converter), can also potentially rely on sufficient pressure (and thus RPM/load), to function properly.
And then to finish that; A modern car uses about 0.5l/hour to idle. A modern diesel would use about 0.75l to 1.0l of fuel to drive 20km (which would take 15 minutes at 80km/h, against the 30 minutes of idling).
So with about 50% to 100% more fuel used, but burned much less efficiently (because no load, inefficient RPM, no turbo pressure); It's not at all unlikely for a car to emit more particulate emissions in 30minutes of idling, than in 15 minutes of driving at an efficient speed.
Rhenic t1_iv5lj53 wrote
Reply to comment by [deleted] in [OC] How long headphones last and where they fail by madredditscientist
Even if permanently attached; You can usually score some pullover covers that will at least feel comfortable again and prevent the flaking getting everywhere.