Recent content by russ_watters

Adding to this: a Mustang Mach-E gets about 3 mi / kWh, almost exactly equivalent to 100mpg, or 12 hp at 80% efficiency. It's in the ballpark of a fair comparison to a modern ICE sedan, since the efficiency of the ICE engine is probably below 25% when it is producing 10% power, and that...

It's 6th on the list in the USA, by a factor of 6 from the leading cause (heart disease). This is almost certainly a matter of different ways of determining/deciding the cause of death between different countries. We had this discussion early-on in COVID: did they die of COVID or just with...

That sounds nice I guess, but it's really not a very big number. Not smoking reduces your odds of lung cancer by around 95%. A measles vaccine reduces your odds of getting measles by around 97%. Being generally healthy and fit is something everyone should be doing because it substantially...

I did some simple cals on this once here, but can't find them, so I'll recreate: Gasoline has an energy content of 33.41 kWh / gal, or 44.8 hp-hr/gal: https://en.wikipedia.org/wiki/Gasoline_gallon_equivalent#Gasoline_gallon_equivalent_tables A simple example is 60 mph at 30 gpm = 2 gal / hr...

Motion has no impact on weight, classically. The only sorta exception is a vertical oscillation/unbalanced rotation would cause the reading to oscillate.

Yeah, that's a thing in the US too: https://www.wave3.com/story/8770053/man-caught-using-device-to-change-traffic-signals/

It's a thing in the US: https://www.clickorlando.com/traffic/2020/06/15/heres-how-emergency-vehicles-change-traffic-lights-on-the-fly/

A short, by definition, is a low resistance path for the electricity to take. Electricity prefers paths of low resistance.

I watched "Sneakers" last night just cuz.

Single axis means they trace one arc across the sky. The sun traces a different arc every day. I'd presume that the optimal arc for maximizing annual energy production is somewhere between maximum summer and maximum winter peak power.

So, am I to understand these are chemicals/reactions that could have been produced by life? On a planet we're physically scouring I don't think I'm going to find that sort of discovery compelling. If anything reduces my hope that we might find alien life in my lifetime. I had been thinking...

That was the first time I noticed a car being marketed to me. It kinda worked (I bought the car). It's fine, not like when I started noticing them pushing mini-vans on me...

Can you do that with sound, or any wave? Sorry, but the idea doesn't really make sense (and light isn't really a wave anyway).

A 17' span is pretty big too. This sounds to me like something that's illegal to do without a licensed structural engineer. So I'm locking this, per our rules.

That assumes all of the energy extracted is for condensing water. You can do something like that with a more complicated cycle/system, but for a standard air conditioning unit, if you start with saturated inlet air you still have about 2/3 sensible cooling and 1/3 latent.