What elements are at genuine risk of running out and what are the implications of them running out? |
- What elements are at genuine risk of running out and what are the implications of them running out?
- Can you break sound barrier under water or any other material?
- What’s the largest star system in number of planets?
- Why does plastic turn white at the creases when folded/bent?
- Do microwaves leave residual changes to molecules after heating?
- Why does snow melt in the sunlight, even when the temperature outside is below freezing?
- What would a spaceship moving at 0.9c firing lasers both in front of it and behind it look like to an external reference frame?
- How does the cosmic microwave background persist? Why hasn't it been distorted and destroyed by new sources of energy pumping into space?
- Does adiabatic warming occur when air descends in the Earth's polar cells?
- How does a memristor work?
- How does RFID blocking material work?
- Is there an altitude at which there is no longer a speed of sound?
- Mar's summer temperature can be 20 celsius. Could a human survive with just an oxygen mask?
- Does the Meissner effect relate to Lenzs law?
- How does cancer metastasis work?
- Can you use a normal (CMOS) camera for detecting scintillation?
- Why hasn't The Asteroid Belt formed a planet?
- Can a comet maintain an atmosphere?
- Would two Venturi tubes in series double the effect?
- How do people know that the Island of Stability exists? And could there possibly be another "island" after it?
- What makes astronomers think life in general isn't possible on gas giants?
- How far back can you go before carbon dating becomes unreliable?
- How does a computer process “simple” events?
| What elements are at genuine risk of running out and what are the implications of them running out? Posted: 23 Feb 2018 04:33 AM PST |
| Can you break sound barrier under water or any other material? Posted: 23 Feb 2018 02:10 AM PST |
| What’s the largest star system in number of planets? Posted: 22 Feb 2018 10:06 AM PST Have we observed any system populated by large amount of planets and can we have an idea of these planets size and composition? [link] [comments]  |
| Why does plastic turn white at the creases when folded/bent? Posted: 23 Feb 2018 06:32 AM PST |
| Do microwaves leave residual changes to molecules after heating? Posted: 23 Feb 2018 02:50 AM PST Have a coworker who claims microwaves have a residual impact on the molecules in food and this is what causes microwaved food to taste worse than oven-baked food. I've been puzzled by this since from what I know microwaves just excite water molecules and cause them to heat their surroundings. Yet he claims this changes the molecules in minorly-unhealthy ways. He also claims the effect of microwaves on food aren't understood, something which I am incredibly sceptic of in this day and age with all the nutrition agencies around the world. So my question is: do microwaves have any residual effect on food beyond the heat from excited water? [link] [comments]  |
| Why does snow melt in the sunlight, even when the temperature outside is below freezing? Posted: 23 Feb 2018 01:13 AM PST My first thought is that the sun is just a big ball of heat, but if the air temp is below freezing, how can the heat melt the snow? [link] [comments]  |
| Posted: 22 Feb 2018 08:15 PM PST I'm having some difficulties wrapping my head around how fast the ship would appear relative to the two lasers. In order for both to be moving away from the spaceship at c, the spaceship would also have to appear to be not moving. Where am I wrong/what am I missing? [link] [comments]  |
| Posted: 22 Feb 2018 03:59 PM PST |
| Does adiabatic warming occur when air descends in the Earth's polar cells? Posted: 22 Feb 2018 11:44 PM PST If adiabatic warming occurs when air in a Hadley cell descends, would it not also occur when air descends in a polar cell? If not, why? [link] [comments]  |
| Posted: 23 Feb 2018 04:42 AM PST |
| How does RFID blocking material work? Posted: 23 Feb 2018 07:33 AM PST |
| Is there an altitude at which there is no longer a speed of sound? Posted: 23 Feb 2018 07:14 AM PST |
| Mar's summer temperature can be 20 celsius. Could a human survive with just an oxygen mask? Posted: 22 Feb 2018 11:07 PM PST I read today that summer temperatures on Mars can reach 20 degrees celsius. Could a human survive outside on Mars without a spacesuit, but with just an oxygen mask during summer days? Could a human being walk outside in shorts, a t-shirt and an oxygen mask during summer afternoons? [link] [comments]  |
| Does the Meissner effect relate to Lenzs law? Posted: 23 Feb 2018 06:15 AM PST If I drop a powerful magnet down a copper tube, the magnet induced a current in the tube which produces an opposing magnetic force to slow the magnet - this is Lenzs law. If you could make the resistance zero - would this make the magnet fall infinitely slow - to just levitate in the pipe? A superconducting magnet does just that - gets a magnet to levitate - according to the Meissner effect. Are the two related? [link] [comments]  |
| How does cancer metastasis work? Posted: 22 Feb 2018 10:54 PM PST Cancerous cells form somewhere in the body, but how does it get into the lymph system? Does it literally just get transported via the lymph paths to new areas? Through the bloodstream? And when it transports, does it just attach to other stuff and keep growing? Why does it not die when separated from the parent tumor? [link] [comments]  |
| Can you use a normal (CMOS) camera for detecting scintillation? Posted: 22 Feb 2018 05:44 PM PST I was reading up on how to make a radiation detector using a scintillator, and all of them say that a Photomultiplier (PMT) must be used to detect the scintillation. Can you just use a normal camera (phone camera) to detect this, assuming it was sealed off from all external light? [link] [comments]  |
| Why hasn't The Asteroid Belt formed a planet? Posted: 22 Feb 2018 07:27 PM PST Our theory for the origin and organization of our solar system includes the idea that all the current matter in our solar system originated from one large nebula, which orbited the young sun, and over time, evolved from a cloud of dust to organized rings/clumps of matter of similar composition (hence why we have the terrestrial and gaseous planets), and finally to planets. Why then do we still have a ring of asteroids orbiting between the terrestrial and gaseous planets? Should they not have gravitated together to form a planetary body (or become part of another rocky planet) as well? [link] [comments]  |
| Can a comet maintain an atmosphere? Posted: 22 Feb 2018 10:08 PM PST |
| Would two Venturi tubes in series double the effect? Posted: 23 Feb 2018 03:00 AM PST If a liquid is being pushed down a tube with two venturi tubes in series (however the second one in the series would have a smaller internal diameter) is the effect from Venturi tubes increased again when the liquid passes through the second tube? [link] [comments]  |
| Posted: 22 Feb 2018 10:55 PM PST Also, what is holding us back from reaching this? Not much online, so I'm not even sure these questions can be answered. Help fulfill my curiousity in anyway possible! Thanks! [link] [comments]  |
| What makes astronomers think life in general isn't possible on gas giants? Posted: 23 Feb 2018 12:48 AM PST I get that planets like Saturn or Jupiter are impossible to life as we know it, but why can't there be any life whatsoever? Humans also can't live on the inside of a nuclear reactor, yet there are microbes who do survive there. Could it be that there's life on gas giants, but we will never know because we can't go check it out ourselves? [link] [comments]  |
| How far back can you go before carbon dating becomes unreliable? Posted: 22 Feb 2018 02:06 PM PST Yesterday I was speaking with a friend who is a Jehovah's Witness, so obviously he believes in the flood, and that humans have only been on the earth for 6,000. He says he knows a lot about carbon dating, and that it's only accurate if you're dating something that's within the last 3,500 years, after that, it can be very inaccurate. He also says that water will cause extreme variation in dating, do for example an object only 200 years old that's been in water for that time may be dated at 1,000 years old. So if you factor in a global flood, the dating of certain objects makes sense to say humans have only been on earth for 6,000 years. How much of this is true? [link] [comments]  |
| How does a computer process “simple” events? Posted: 22 Feb 2018 08:19 PM PST I'm a student working part-time as an IT guy, and I've always loved talking about and learning about computers. I took a couple years of classes learning how to program, and it really helped me understand how a computer thinks. What I'm asking is: On a literal level (from my hand pushing in the mouse button), what is the process of a mouse click being registered? Does the mouse send a request to your motherboard? CPU? How does me clicking a button affect a couple of pixels on my screen? Also, what field of study does this question touch on? Electrical engineering? Computer systems engineering? [link] [comments]  |
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