Leaderboard

Don't want to be a stickler about this but the F-35b has a greater radius of action than the plane it replaces with the US Marine Corps, the McD-D/BAE AV-8B Harrier II. So even in VTO it is 'useable'. It has internal weapon bays ( otherwise it would not be very stealthy, would it ) for carrying missiles or JDAMs ( GPS guided bombs ) and the thrust available from its engine is enough for VTO in this configuration. It was expressly built with this capability in mind as this video of the x-35 from the early 2000s shows Another capability the Marines wanted was the ability to fly backwards, as they had practiced such maneuvers from the hover with the AV-8Bs. Since the 'lobster tail' rear nozzle can be rotated past 90o, and the front vertical nozzle has adjustable vanes, other users of the F-35B, like the Brits, have even practiced backward landings on the HMS Qeen Elizabeth. See this article F-35B lands backwards on HMS Queen Elizabeth carrier | Aerospace Testing International The fact that these capabilities are not often used in practice sorties doesn't mean they cannot be performed in an emergency, or conflict, situation. ( sorry if I sound like a military hardware fan boy )

When an eye doctor looks at your retina, he is looking through several different layers. The cornea is usually transparent, but it can have scarring or uneven curvature, making for a fuzzy view. The aqueous humor is a liquid that fills the front part of the eye, most always clear, but hi-pressure of this fluid ( due to poor drainage ) is the cause of glaucoma and loss of optic nerve function. The lens is next, and both the lens and its capsule can become cloudy. The capsule can be cleared with a YAG laser ( see Yag laser capsulotomy ), but once the lens becomes obscured, a condition known as cataracts, it is removed and replaced by an artificial lens ( one of the most common eye operations ). Between the back of the lens capsule and the retina is the gelatinous humor, which can sometimes be occluded by traces of blood due to trauma of the eyes. Most people have experienced these 'floaters', but sometimes excessive trauma to the blood vessels feeding the retina can dramatically increase their numbers. All of these conditions introduce screening that prevents the doctor from getting a clear view of the retina at the back of the eye. ( yes, I have glaucoma, had cataracts removed, and YAG laser capsulotomy )

Space-time is a co-ordinate system. I would say that is something. I'm sorry you missed 'WKRP in Cincinnati', Joigus.

I really want a T-shirt that says, "I see nothing! I was not here! I did not even get UP this morning!"

Sorry, but science can answer "What makes the sky appear blue?", but not "why". Why do you want to remove the meaning from a wonderful word like "why", and equate it with "what" or "how"? Definitions are critical when you are discussing science.

If you accept that no cause is needed to explain the supernatural, why not remove your fictional narrative (which adds nothing but complexity) and accept that perhaps no cause is needed to explain the natural? I understand you just fine, but you’re making silly and specious arguments that rational thinkers should dismiss as the nonsense they are. False, and ignorant too

Whoa there. Science attempts to explain natural phenomena. There is absolutely NO EVIDENCE of anything that violates that. EVERYTHING is observed to function within the parameters of the natural universe. If you're claiming something is outside that, or SUPERnatural, then you aren't doing science.

They can; he did. And you will find the God Squad doing it a lot when they discuss abortion. So well over half don't think that. And, beware of selection bias.

Exponential does not just mean getting bigger and bigger. See the other posts that explain. To put it In words, rather than in maths, an exponential process is one in which the rate of growth or decline is proportional to the magnitude of whatever it is that is growing or declining. So for example, in radioactive decay the rate of decay is proportional to the amount of substance that has not yet decayed. So the rate of decline itself declines as more and more of the material decays. Or, in the unconstrained growth of a bacterial colony, the rate of growth is proportional to the number of bacteria present at any given moment, because each cell divides at a fixed rate so the more cells there are the faster it grows. This does not apply to gravitation. The force an object experiences grows as an inverse square of the distance from the attracting body. That is not an exponential.

I respect life on all levels, and to me that means avoiding unnecessary killing. Insects can pose specific problems, and I'd have no qualms fumigating or getting rid of true pests, but if there's no need to kill those bugs, I don't do it. I especially wouldn't kill something to impress a person. That seems like animal behavior, something I try to rise above. I remember doing dumb things to impress women, but eventually I learned to appreciate the ones who liked learning about bugs rather than the ones who wanted me to kill them. I'm living right now with several bull snakes on the property. They're fascinating creatures, and we rarely see them when we're outside, but occasionally one gets startled and goes on defense. It hasn't happened to me yet, and it will probably scare the wee out of me (they emulate a rattlesnake when threatened, making their head flatter and hissing like a rattle). I'm OK with the occasional scare, but if one of them actually bites (non-venomous), he's going to be relocated with airborne prejudice. There's a park behind me that could use an aggressive snake. I don't hunt. I haven't fished for decades, and I NEVER fished catch-and-release. I killed and ate the fish instead. For anyone who thinks the bugs they step on don't matter, I highly recommend David Attenborough's A Life on Our Planet. It's his witness statement to the effect that biodiversity is what makes the Earth so unique and valuable, and anything you're doing to harm that is a crime.

Don't worry. It's nothing

Australia plays in a different league when it comes to bugs. Most insects and arachnids won't harm you if you don't mess with them. I think it's gratuitously violent to kill animals just because it makes you feel more comfy. Take your picnic somewhere else is my advice. Similar reason why I oppose bullfighting, and hunting and fishing just for sport. We do enough damage as it is by destroying habitats at the rate we are. It's also a matter of growing up, IMO. Last time I killed a small animal at a place that's not in my home I was like ten. Stamping on an ant's nest would make me feel ridiculous today. The last time I stepped on a spider to feel manly in front of a girl I must have been something like that age too. But if I haven't convinced you, I suggest you extend your strategy to grizzly bears. Those can really disturb your picnic.

Small number. Which is perfectly consistent with there being a spectrum of attitudes on the topic. I'm on the part that dislikes sport fishing and tends not to kill spiders (at least, the ones that can't kill me, were I to be confronted with that scenario)

I guess the crux of the question depends on the definition of "nothing". A difficult one to answer in its own context without adding any further complications. For me these types of questions can be nonsensical when you delve into what is physically possible. It's a bit like asking what came before the big bang, if the big bang was considered the moment of all creation. Well the first obvious answer is "nothing", then we get right back into what defines nothing in the true sense of reality. There is an hypothesis that states that "nothing" can't be, in that nothing is unstable as it requires something to define it. Which is why there is something rather than nothing. Going back to the OP, I guess that if we state that the box just contains empty space then, yeah sure that space would move with the box since nothing can enter the box. But true nothing has no dimensional or physical properties in every sense of the word therefore cannot exist even in empty space. What make this scenario worse is the fact that the box itself is defining an area of space so the box contains something. Nothing therefore exists (want for a better word) outside of all existence, time, space etc... so its non quantifiable in physical measurement and also in concept.

Turn it the other way around - if healthcare workers refuse vaccination and they become a vector for Covid transmission, should they be legally liable for medical/funeral/other expenses of those who get sick as a result? Should their employers face legal sanctions for failure to insist on vaccination? Seems to me there are duties of care that override any personal "free" choice.

Generally speaking, I support mandatory vaccinations for all, unless exempted because of a medical condition or other valid reason, as confirmed by the local government authority under strict medical advice. What penalties would be involved I can't really say at this time, but in Australia in certain states, parents of children that fail to get their child vaccinated as per recommendations, can be refused daycare and kindergarten services. There maybe other reasons or situations that may require exemptions and those can be looked at by the appropriate agency. As another example, our national airline QANTAS is proposing when International travel reopens, that all passengers would need to show a valid certificate of vaccination, or boarding will be refused. It's really the only way we are going to beat this insideous thing. BTW Sydney where I am is in total lockdown for two weeks [unless dramatic improvement and/or eventual elimination of cases is observed which may change if medically advised] We had 18 new cases over the last 24 hrs.

They claim laser based interception systems will be developed in the future to keep the current aircraft carrier based strategy viable. Carriers are screened and flanked by escort craft to protect them. Battleships would be a direct competitor to aircraft carriers. If a battleship could hit a target 100 miles away with relative accuracy. An aircraft carrier could launch bombers that hit the same target 100 miles away, with greater accuracy. They're both competing for the same job. A single battleship or aircraft carrier could be sunk. By a single small nuclear tipped missile or torpedo. Especially new ships like the Gerald Ford carrier which appear to have been poorly designed.

Every word is made up by humans, The word Nothing describe the lack of something. wiki: Nothing", used as a pronoun subject, is the absence of a something or particular thing that one might expect or desire to be present ("We found nothing", "Nothing was there") or the inactivity of a thing or things that are usually or could be active ("Nothing moved", "Nothing happened"). As a predicate or complement "nothing" is the absence of meaning, value, worth, relevance, standing, or significance Note that even we perceive the absolute lack of something, the perception will be recognised in the local part of space(time). Space(time) still will be a thing, it is physically unrecognisable and mathematically expressable. 0.

More information needed. Mandatory for whom? Who’s mandating them? Under what conditions does the mandate apply? Are there exceptions? If so, who approves and confirms qualification for exception? What are the penalties for noncompliance? Which vaccine is being mandated? Who pays for them? Is a single does sufficient, or are booster shots mandatory, too?

! Moderator Note This is NOT the philosophy section. If you can't help, don't post.

Bingo!! Father George Lamaitre, Belgian Jesuit priest, known as the father of the BB.

Hello I have heard many things about how electrons/em fields move through a circuit. Can someone give me a good mental image of what a em field is and how it moves through a wire? Iv seen many respones on how electrons moving cause em field/magnetic field (again iv heard elctonic field and magnetic field idk which one) like how electrons moving causes friction which causes heat which causes photons which are the virtual photons in magnetism. I dont know if that is right. So what im asking is a correct answer covering what is the thing flowing and causing power in a circuit. If its electromagnetic field explain how electrons movement causes electro or magnetic fields. What are thos fields made of and how do they work? How is velocity made, what causes electrons/electronic fields to move through a circuit. I'v always heard or understood it as the seperation of positive(protons) and negative(electrons) which causes attraction. JUST CLEAR EVERYTHING UP FOR ME!!! Thanks

The easiest way to visualize electrons moving through medium is Cloud Chamber Long thin trace is typically electron/positron. Short thick trace is typically alpha particle. After applying external electric field and/or external magnetic field, these traces bend accordingly to charge of particle (electron -1e, positron +1e, proton +1e, alpha +2e, etc. etc.) and momentum they had. If you have particle at rest to the box (better with quite good vacuum), and you create external electric field, particle is starting moving (it's accelerated) toward one electrode or other electrode. After hitting electrode, kinetic energy of particle is lost, and new particle is created. For small energies, it's photon, visible, UV, x-ray. While deceleration, high velocity particle, is creating true photons, not virtual photons.

Really? you really want to descend into such pettiness so soon.