header pic

Perhaps the BEST B1G Forum anywhere, here at College Football Fan Site, CFB51!!!

The 'Old' CFN/Scout Crowd- Enjoy Civil discussion, game analytics, in depth player and coaching 'takes' and discussing topics surrounding the game. You can even have your own free board, all you have to do is ask!!!

Anyone is welcomed and encouraged to join our FREE site and to take part in our community- a community with you- the user, the fan, -and the person- will be protected from intrusive actions and with a clean place to interact.


Author

Topic: Weather, Climate, Environment, and Energy

 (Read 524384 times)

Cincydawg

  • Oracle of Piedmont Park
  • Global Moderator
  • Hall of Fame
  • *****
  • Default Avatar
  • Posts: 71536
  • Oracle of Piedmont Park
  • Liked:
Re: Weather, Climate, and Environment
« Reply #1218 on: April 28, 2019, 10:12:03 AM »
We all seem to agree that autocars and trucks are coming and will shake things up, it's less clear as to "when" of course.  I've been a passenger in a Cadillac CT6 with "Supercruise" and it was impressive on the freeways.  We likely will have "safety drivers" for some years after this gets rolling for real.

Manual transmissions are disappearing.  The higher end performance cars all fare better with automatics today.  Most of the Ferrari types only offer automatics (twin clutch usually because their gear changes are superfast).  It's interesting to hear one accelerate with a TCT, even a BMW or whatever, it's just a click, no pause.

Our GTI has a clutch and manual gear box because it's "fun", though not always so fun in creeping city traffic.  It's pretty easy to operate though.

Our condo is discussing adding charging stations.  We've had folks interested in purchasing but they own Teslas and that is critical for them.  The HOA owns four spaces, so my recco was to add charging stations for them and "charge" the customers who use them a fee.  There is a fairly nice but older condo building near us built in the 1950s that does not have parking, it's amazing how critical parking is around here, and obvious, duh.  We have two spots fortunately.  Some buildings charge $160 a month for each spot.  It's akin to Delta and baggage fees.

Speaking of which, we're boarding the Shiny Bird for France on Wednesday, so my presence to track ELA's meanderings will be spotty.  Perhaps someone else can assume the "responsibility", I do like seeing who is gone and who is left among the P5s.

FearlessF

  • Hall of Fame
  • *****
  • Posts: 37520
  • Liked:
Re: Weather, Climate, and Environment
« Reply #1219 on: April 28, 2019, 10:21:18 AM »
hopefully, the Utes have come up by Wednesday!
"Courage; Generosity; Fairness; Honor; In these are the true awards of manly sport."

Cincydawg

  • Oracle of Piedmont Park
  • Global Moderator
  • Hall of Fame
  • *****
  • Default Avatar
  • Posts: 71536
  • Oracle of Piedmont Park
  • Liked:
Re: Weather, Climate, and Environment
« Reply #1220 on: April 28, 2019, 02:55:07 PM »
Two Utes?

What did you say?  Two what?

OrangeAfroMan

  • Stats Porn
  • Hall of Fame
  • *****
  • Posts: 18841
  • Liked:
Re: Weather, Climate, and Environment
« Reply #1221 on: April 28, 2019, 05:07:04 PM »
Paiutes and Utes?
“The Swamp is where Gators live.  We feel comfortable there, but we hope our opponents feel tentative. A swamp is hot and sticky and can be dangerous." - Steve Spurrier

Cincydawg

  • Oracle of Piedmont Park
  • Global Moderator
  • Hall of Fame
  • *****
  • Default Avatar
  • Posts: 71536
  • Oracle of Piedmont Park
  • Liked:
Re: Weather, Climate, and Environment
« Reply #1222 on: April 29, 2019, 04:41:38 PM »
Humid air is less dense than dry air.


Anonymous Coward

  • All Star
  • ******
  • Posts: 3187
  • Liked:
Re: Weather, Climate, and Environment
« Reply #1223 on: April 29, 2019, 06:17:38 PM »
That's interesting. I don't spend much time thinking about this. Let me toss an idea off you for fun: Is this due primarily to molecular mass - H2O being so much lighter than the diatomic oxygen and nitrogen it's displacing per unit volume?

Because I didn't have this (humid > dry) factoid, I had to wrestle with it for the last couple minutes. My original intuition was for the opposite on the basis of heat capacity. I figured that'd be a dominant factor. That, because humid air has a higher heat capacity, it may take more heat energy for it to rise to a specific temperature than the heat change necessary for dry air to rise to that same temperature. And therefore dry air would rise sooner than humid air as the humid air is delayed in reaching the same temperature (...which is directly related to those molecules occupying volume and inversely related to their density).

Clearly that's incorrect. Would enjoy seeing your explanation.
« Last Edit: April 29, 2019, 06:27:38 PM by Anonymous Coward »

Cincydawg

  • Oracle of Piedmont Park
  • Global Moderator
  • Hall of Fame
  • *****
  • Default Avatar
  • Posts: 71536
  • Oracle of Piedmont Park
  • Liked:
Re: Weather, Climate, and Environment
« Reply #1224 on: April 29, 2019, 06:31:56 PM »
H2O weighs less than O2 and N2, you had it right at first.  A mole of gas takes up the same volume no matter what (ideally).

It's less of a factor than is temperature.  As a pilot, one has to watch temperature carefully if nearing close to the maximum takeoff weight.

betarhoalphadelta

  • Global Moderator
  • Hall of Fame
  • *****
  • Posts: 12185
  • Liked:
Re: Weather, Climate, and Environment
« Reply #1225 on: April 29, 2019, 06:44:47 PM »
Well, when barometric pressure is falling [storms coming in], that correlates to rain/humidity/water in the air. When barometric pressure is high, that's nice clear sunny days. Right?

betarhoalphadelta

  • Global Moderator
  • Hall of Fame
  • *****
  • Posts: 12185
  • Liked:
Re: Weather, Climate, and Environment
« Reply #1226 on: April 29, 2019, 06:45:36 PM »
H2O weighs less than O2 and N2, you had it right at first.  A mole of gas takes up the same volume no matter what (ideally).

It's less of a factor than is temperature.  As a pilot, one has to watch temperature carefully if nearing close to the maximum takeoff weight.
Yep. Cold air is more dense than hot air. 

Which is odd, because most humans spewing lots of hot air are incredibly dense.

Cincydawg

  • Oracle of Piedmont Park
  • Global Moderator
  • Hall of Fame
  • *****
  • Default Avatar
  • Posts: 71536
  • Oracle of Piedmont Park
  • Liked:
Re: Weather, Climate, and Environment
« Reply #1227 on: April 29, 2019, 06:50:42 PM »
Well, when barometric pressure is falling [storms coming in], that correlates to rain/humidity/water in the air. When barometric pressure is high, that's nice clear sunny days. Right?

Yup.  But the falling pressure usually is more a result of a low pressure system, which sounds circular I know.  Low pressure systems circulate air counterclockwise, think hurricanes, and high pressure the other way in the north.  There was a neat synopsis I still recall from the aviation written example:  The earth's weather is caused by differential heating of the surface by the sun", or something to that effect.  The rotation of the planet is another factor of course and leads to all this spinning.

The written test is odd because it is multiple choice with three possible answers given.  Usually one is ridiculous and two are kind of close, or spot on.

I ended up just memorizing the tougher questions, they give them to you ahead of the test, maybe 250 possible of which 60 appear on the test.  I missed one as I recall, no idea which.

Cincydawg

  • Oracle of Piedmont Park
  • Global Moderator
  • Hall of Fame
  • *****
  • Default Avatar
  • Posts: 71536
  • Oracle of Piedmont Park
  • Liked:

FearlessF

  • Hall of Fame
  • *****
  • Posts: 37520
  • Liked:
Re: Weather, Climate, and Environment
« Reply #1229 on: April 29, 2019, 08:27:08 PM »
Hydrogen Cars Have 4× Annual Fuel Cost & 2–70× The Carbon Debt As Electric Vehicles

https://cleantechnica.com/2019/04/26/hydrogen-cars-have-4x-annual-fuel-cost-2-70-times-the-carbon-debt-as-electric-vehicles/
"Courage; Generosity; Fairness; Honor; In these are the true awards of manly sport."

Anonymous Coward

  • All Star
  • ******
  • Posts: 3187
  • Liked:
Re: Weather, Climate, and Environment
« Reply #1230 on: April 30, 2019, 01:33:54 PM »
Yeah, I'm not really clear on why anyone would prefer hydrogen cars. I've read that our extraction technologies seem beholden to natural gas (in terms of "mining" H2 fuel). That's less of a problem today, in comparisons with EVs, because much of our electricity comes from burning carbon sources anyway (though there is already a numeric difference). But it does mean that whereas EVs *can* become even cleaner as the electrical grid becomes cleaner, such progress for H2 is likely to lag behind. Also: H2 vehicles have similar cost, energy density, and driving range as current EVs. And since H2 energy density can't really change, whereas battery technology is advancing, here too EVs look to leave H2Vs behind.

Then there're social comparisons. If everyone is charging their cars at home, refilling at an H2 station will seem primitive. And ... even if it becomes maximally safe, riding on a mini-Zeppelin tank is always going to feel scarier than riding on an electric battery.

Cincydawg

  • Oracle of Piedmont Park
  • Global Moderator
  • Hall of Fame
  • *****
  • Default Avatar
  • Posts: 71536
  • Oracle of Piedmont Park
  • Liked:
Re: Weather, Climate, and Environment
« Reply #1231 on: April 30, 2019, 01:49:59 PM »
Fuel cells offer better range than batteries, which is why we used them on spacecraft (along with some batteries as backup power).

Apollo 13 had an issue with this.

Producing hydrogen using electricity is somewhat akin to shipping electricity by wire and storing it chemically in a battery.

When automobiles started out, we had the IC engines, steam engines, and battery powered EVs.  The ICs won out because of cost and power density.  Nothing has supplanted them yet, and it's not for lack of trying.


 

Support the Site!
Purchase of every item listed here DIRECTLY supports the site.