Should the presence of a heart stent affect the way CPR is performed? |
- Should the presence of a heart stent affect the way CPR is performed?
- If you take a DNA sample from a newborn, would it match a DNA sample from when the same person is 80?
- Lightning produces ozone. Many ionizing air purifiers also produce ozone. Does an electric current exposed to air always produce ozone?
- What is the difference between axial tilt and axial precession?
- If a huge and dense enough amount of coherent light was emitted, would it create a black hole traveling at the speed of light?
- How did scientists discover the maximum G-limits of humans?
- Why does cellular regeneration degrade as an organism ages?
- Does the use of female birth control alter when women go through menopause?
- If factoring numbers with ~1000 digits is so difficult that it is used in encryption, how do we know of primes with many millions of digits?
- Why does wet rubber squeak when rubbed?
- How do calculators evaluate the zeroes of polynomials? Does it depend on the nature of the polynomial?
- If we find life on Mars, how will we know it didn't come from tiny organisms on any of the rovers?
- Is the role of pressure vs. concentration gradient for gas solutions the same as it is for liquid solutions?
- Why does my face turn red during strenuous activity instead of the body part(s) I'm using?
- How does Asymetric Encryption actually work?
- Does a massless particle traveling through a medium experience the passage of time?
- How do modern game clients allow you to play a game before its finished downloading?
- If HIV was wiped out could it ever come back again?
- Do we know where the matter that created the sun came from? Is our solar system the rebirth of a previous star, or one of the original stars from the Big bang?
- What are some strange things that happen under EXTREME magnetic fields?
- Can radar be used to track small moving objects like basketballs?
- A planet sized ball of water - what would happen?
- In most pictures of planets why are there no stars in the background?
| Should the presence of a heart stent affect the way CPR is performed? Posted: 07 Oct 2016 09:17 PM PDT Should the presence of a heart stent (ie Contegra Heterograft) affect the way CPR is performed? If so, how and why? Are there any risks/negative consequences of performing standard CPR on someone with a heart stent? [link] [comments]  |
| Posted: 07 Oct 2016 05:44 PM PDT |
| Posted: 07 Oct 2016 07:56 PM PDT Does this mean that those open coil electric heaters are bad for people with asthma? How do ionizing air purifiers generate ions? [link] [comments]  |
| What is the difference between axial tilt and axial precession? Posted: 08 Oct 2016 03:22 AM PDT |
| Posted: 08 Oct 2016 02:46 AM PDT Would the event horizon only cover the leading edge, not the trailing edge? [link] [comments]  |
| How did scientists discover the maximum G-limits of humans? Posted: 07 Oct 2016 09:11 PM PDT Did they just keep testing humans or animals to figure out the limits? [link] [comments]  |
| Why does cellular regeneration degrade as an organism ages? Posted: 08 Oct 2016 05:18 AM PDT Bonus question: Why do cold-blooded creatures tend to have longer lifespans than warm-blooded creatures? [link] [comments]  |
| Does the use of female birth control alter when women go through menopause? Posted: 08 Oct 2016 07:41 AM PDT Traditional female birth control "the pill" works by not releasing an egg correct? And women have a fixed number of eggs that are released before they go through menopause so does long periods of time on birth control delay the onset of menopause? Feel free to correct any mistakes I've made here. [link] [comments]  |
| Posted: 07 Oct 2016 12:15 PM PDT I know that certain cryptographic systems use large prime factorizations as their encryption method because it takes a long time to factor large numbers, and using numbers with 1000+ digits produces an encryption that is nigh-unbreakable with current technology. So how is it that the largest known prime has over 20 million digits and we know of many prime numbers with millions of digits, if factoring numbers is so difficult? [link] [comments]  |
| Why does wet rubber squeak when rubbed? Posted: 08 Oct 2016 02:34 AM PDT Normally when rubber is dry it does not make much sound rubbing on the ground, but when it gets wet it can cause a high pitch squeak when making contact with, say, the ground. [link] [comments]  |
| Posted: 08 Oct 2016 06:00 AM PDT Hello, I'm curious to know how my calculator (it's a Casio) calculates the roots to polynomials. I would guess for quadratics, it uses the formula, and probably for cubics and quartics. But above that, there are no general formulas, so it has to use approximate methods somehow. What approximate methods do calculators use for root-finding of polynomials, and what degree of polynomials do they use them for? (Would a 4th degree polynomial be evaluated with an approximate method, or the monstruous formula?) Thanks! [link] [comments]  |
| If we find life on Mars, how will we know it didn't come from tiny organisms on any of the rovers? Posted: 07 Oct 2016 11:58 PM PDT |
| Posted: 08 Oct 2016 05:50 AM PDT Let's say you have two equal volume, equal temperature chambers separated by a semipermeable membrane: In the left chamber there is pure oxygen at 2 atmospheres of pressure. In the right there is pure nitrogen at 1 atmosphere of pressure. The membrane is only permeable to nitrogen. What happens? Is it similar to the usual osmotic pressure teaching example? Does the nitrogen diffuse into the left chamber increasing the pressure gradient until it counteracts the diffusion gradient? [link] [comments]  |
| Why does my face turn red during strenuous activity instead of the body part(s) I'm using? Posted: 08 Oct 2016 02:02 AM PDT If I'm lifting something heavy, to me it would make more sense that blood rushes to my arms instead of my face [link] [comments]  |
| How does Asymetric Encryption actually work? Posted: 08 Oct 2016 05:30 AM PDT Hello Reddit, I learned about encryption using asymetric keys a few years ago, but never truly understood it. I get that (for example) I have a public key and a private key and then you also have your own public key and private key; that if we swap public keys that I can encrypt a message using your public key that you can decrypt with your private key; but in the end, it all still seems like a magical black box. What would this look like in the real world? Are there any more "tangible" examples not in cyberspace?? Thanks! [link] [comments]  |
| Does a massless particle traveling through a medium experience the passage of time? Posted: 08 Oct 2016 01:14 AM PDT For example, if a photon is slowed traveling through a medium it is moving slower than C. So would it experience time? [link] [comments]  |
| How do modern game clients allow you to play a game before its finished downloading? Posted: 08 Oct 2016 01:10 AM PDT Recently, Origin (EA) and Uplay (Ubisoft) have gotten a new feature. Whenever you download a game, you can play it whilst it is downloading, as soon as it gets past a certain percentage downloaded. For example, I was downloading a racing game called "The Crew" and I could play the game as soon as 10% of it had downloaded, without installing anything, and the quality seemed just fine. How does this work? It is blowing my mind. [link] [comments]  |
| If HIV was wiped out could it ever come back again? Posted: 08 Oct 2016 04:28 AM PDT Imagine if everyone today that was HIV positive didn't spread it to anyone else, when they eventually all died and there was no longer anyone on the planet that had the virus is there any way it could reappear in humans again? [link] [comments]  |
| Posted: 07 Oct 2016 01:04 PM PDT Or are there other ways for stars to originate that I'm not aware of. [link] [comments]  |
| What are some strange things that happen under EXTREME magnetic fields? Posted: 07 Oct 2016 09:48 AM PDT I was reading about the magnetar SGR 1806-20, which has a magnetic field of 1015 Gauss (1011 Tesla in intensity) . The article said that if this magnetar were as close as the moon to Earth, it could re-arrange the molecules in your body. What are some other wacky quantum and macroscopic things that happen under these most powerful magnetic fields in the universe? What could happen under even greater strength fields? [link] [comments]  |
| Can radar be used to track small moving objects like basketballs? Posted: 08 Oct 2016 12:39 AM PDT Another person asked a similar question in the context of tracking bullets. But what if you only wanted to track small moving objects, like a ball or a person, within a 1000 foot radius? Is that possible with radar? If not, could you explain why? If yes, would the radar device need to be large, or could it be made into a handheld device? Radar is very cool, and reading the question prompted deeper questions. :) Thanks so much! [link] [comments]  |
| A planet sized ball of water - what would happen? Posted: 07 Oct 2016 01:54 PM PDT Say you had a planet sized ball of water entering the solar system from interstellar space to take up an orbit between Mars and Earth. Something approximately double the size of Earth, and all it was made of was pure H2O. No impurities, no residual trace elements, literally nothing else. What would happen? Would it be frozen just on the outside, or all the way down to it's "core"? Would the core experience fusion? Would the outer layer be frozen solid, and then there be a liquid inner layer, and then finally a solid inner layer because of pressure? What would happen? Any thoughts would be greatly appreciated. Thank you. [link] [comments]  |
| In most pictures of planets why are there no stars in the background? Posted: 08 Oct 2016 03:33 AM PDT https://i.imgur.com/biVkvOX.jpg In all of these pictures you cannot see stars around the planets. Why? The last picture, of the moon, especially confuses me. From earths surface we can see stars in the sky - why is that different from the moon's surface? [link] [comments]  |
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