Recent Posts

Pages: [1] 2 3 ... 10
I got a reply to my one email. Evan replied. I was very pleased.
My understanding is that at some time in the far distant future even our galaxy will be pulled apart by expansion, though by then it will consist of nothing but dead remnants (black holes, neutron stars, white dwarfs, etc.) And that eventually even the atoms that once were us will be pulled apart.

I am not a cosmologist. I just seem to remember reading this. I am open to being corrected.
Health, Fitness, Nutrition, and Medicine / Re: Wim Hof Method?
« Last post by lonely moa on Today at 02:16:22 PM »
Dry glaciers are glaciers without snow on the surface.

Thousands of people are guided on such glaciers in NZ each year without being roped to a guide.  That's how we are taught to do it.  Works perfectly. 
I do both Aerobic and lifting. At my age the loss in muscle mass will be an issue and it helps in life to be able to lift heavy things. Since I've been doing dead lifts I have noticed that lifting stuff off the ground in everyday life is easier.

Gotta stay ahead of the sarcopenia, osteoporosis curve.  I want to bounce, not break. 
That's interesting. From what I know it has not been completely established that the Romans and the ancient Chinese knew of each others' existence (though they probably did).
I thought it had been, mostly because the historian they had talking about this on the radio, mentioned that they knew the two empires knew of each other as there are Roman writings complaining about the cost of Chinese silk.
Also, as it turns out, complaining about its indecency:
I can see clothes of silk, if materials that do not hide the body, nor even one's decency, can be called clothes... Wretched flocks of maids labour so that the adulteress may be visible through her thin dress, so that her husband has no more acquaintance than any outsider or foreigner with his wife's body.

(from )
Health, Fitness, Nutrition, and Medicine / Re: LCHF and healthy eating
« Last post by gmalivuk on Today at 01:55:12 PM »
Wow, I'm not THAT interested.  Can you pick one that best addresses the risk of ketoacidosis and I'll read that.

Hmm... I don't have Diabetes (I or II) and I read all of those and a few others that weren't as good or repetitive. Why am I THAT interested?
Reading a bunch of articles that you found on your own and found interesting is very different from being directed to a bunch all at one with no indication of precisely what sort of information each might have. It's the same reason people who read a lot for pleasure might skip or procrastinate assigned reading in school.

At minimum, you could have indicated which articles are explicitly based on large-scale studies with accessible findings.
I've definitely got two questions I want to send in for their "Special Project" (one about relative speed and the expansion of the universe, and the other about DNA encoding).

Interestingly, the one question I really want to ask is also about relative speed and the expansion of the universe.
My question is simply about relative speed. Maybe mine can be a primer

Eta: as I understand it, though, velocity is embedded within spacetime which is what is expanding, so the speed and expansion wouldn't be cumulative if that's what you're about

I'm not sure why you mean by "not be cumulative."  My question is really inspired by this video, and is actually about peculiar vs proper motion:

Throughout this video they are mapping the peculiar velocities of the galaxies in our neighborhood of the universe (that is, the portion of their velocity that is not attributable to Hubble's-law expansion).  We and everything in our environment is being attracted to the center of mass of the Laniakea supercluster, giving the impression from these animations that we are all going to be pulled into it.  But we're not.  We're actually moving apart at a rate that will never be overcome by the gravitational pull of Laniakea; eventually, we will move so far apart that Laniakea will not be within our observable universe.  And there are other, closer clusters to which we belong but from which we are also being pulled by the expansion of the universe.  Moreover, we now know that that expansion is itself accelerating, so that we will escape at least some structures from which we would never escape if Hubble's constant were, in fact, constant.

My question is this: to what structures in the Universe are we truly gravitationally bound if one takes into account the accelerating expansion of the Universe? Will the Virgo Supercluster stick together, or is that destined to be ripped apart, too?  What about the local group?  I believe it's still true that the Milky Way and Andromeda are bound for collision?  How about on the galactic scale; is the gravity of our galaxy enough to keep the space between stars from expanding even as the expansion accelerates?  Or will our galaxy eventually be ripped apart, too?  What about even smaller scales, like solar systems?

I guess what I really want to know is what the view from here will be in hundreds of trillions of years.
Podcast Episodes / Episode #586
« Last post by Steven Novella on Today at 11:57:59 AM »
What’s the Word: Apophenia; News Items: Europa Venting, Piezoelectric Roads, Unhackable, Change in Astrological Sign; Who’s that Noisy; Science or Fiction
Podcast Episodes / Re: Episode #585
« Last post by DamoET on Today at 10:27:01 AM »
@ Lubbarin

In a "high risk" course I have attended and IIRC a first aid course or 2, have spoken about how to deal with step voltage from downed power lines.  The first aid course took the scenario of a first aider approaching a scene where there were power lines down over a vehicle or structure.  It was suggested to approach slowly taking very short steps or shuffling feet along the ground, and paying particular attention to whether you could feel a static building in your body, something like hair beginning to stand on end or similar.  Backing away if this sensation was to be felt, and incident to be left till supply orthority turned up and deemed location to be safe.
  The "high risk" course went into a little detail about how to deal with the scenario of the plant your are in operation of coming into contact with power lines.  It was recommended to jump clear of plant to avoid coming in contact with the body of the machine and the ground simultaneously, and then taking shuffling steps away to prevent large step voltage. 
  As an electrician with quite a few years experience, some of the ideas that were put forth in both courses were a little short on detail and managed to make things too simple to feel safe about.  As everything generally is, electricity is another one of those which can be very complex and a simple explanation can do more harm than good.

  On a couple of occasions doing work, I have had a 'volt stick' (simple pen size device to indicate presence of voltage) in my top pocket light up as I have inadvertently come into contact with a 'live' wire or connection, and become raised to the same potential as the supply.  Usually whilst up a fiberglass ladder using insulated pliers and wearing appropriate rubber soled footware.  Becoming that 'bird on the wire' reinforces how critical being insulated from ground is!  'You' also become aware of other people around you who my compromise 'your' insulation.

  Out of interest and possibly to correct a couple of small social innacuracies.

The general use of "high voltage" frustrate me.  In Australia, "High voltage" refers only to voltage OVER 1000V
Low voltage is from 50 - 1000V
Extra low voltage <50VAC or 100VDC

Mains voltage is 230-240vRMS (root mean square [being alternating current, an equivalent direct current comparison needs to be drawn] which makes the power between AC and DC voltage the same when peak AC voltage is divide by root2)  single phase or 340v peak. 

A 10amp switch will/should have a voltage type indicated (or any current breaking device), as it is far easier to break an AC current than a DC one.  Both AC and DC will draw an arc when a switch starts to open, but because AC is cycling through 0 volts and 0 current 100 times per second, breaking that arc is far simpler.

Leaving a power point on will not result in a pool of electricity on the floor in front of the power point! ;)

I think we need to make one thing clear: this was not a church. A church in America is free to refuse to marry anyone it wants. There are churches in the south that still refuse to marry interracial couples, perfectly legally. There are many more churches—probably a majority—which refuse and will continue to refuse to marry gay couples.  They are not places of public accommodation renting out their spaces, but religious institutions conducting religious rites, so they are free to discriminate in their membership and the conduct of their religious ceremonies.  Indeed, the chapel in question is now owned by a church, and that church is free to exclude gays all they want.

But that's not what this was. This was a business offering a public accommodation. They rented out this space for events, including weddings, and because they did that they were required, under state law, to rent the space to people who wished to hold their weddings there without regard to the race, religion, sexual orientation, etc. of those being married. Businesses just don't get to discriminate in offering services to the public.
Pages: [1] 2 3 ... 10