How the heck do jellyfish work if they have no brain or no blood? |
- How the heck do jellyfish work if they have no brain or no blood?
- If someone who is addicted to drugs or nicotine, then suddenly something happens to them and they go in a coma, do they still go though withdrawal?
- Does the moon have a mantle?
- Does reading speed and comprehension decrease if you dont read for say, five or six years?
- Why are the pores on the face so much larger than anywhere else on the body?
- Is the exponential amount of energy needed to move closer to the speed of light only applicable when concerning other nearby frames or our general movement through space?
- Why was the missile test yesterdy visible pretty much over the entire western United States. Why caused it to have an almost blue color and a comet like tail?
- If a solid sheet of a metal were only an atom thick, would we be able to see through it?
- Is it possible a powerful supernova could wipe out the earth with no way to detect its approach?
- How is a "green", environment-friendly detergent different from a regular one?
- If I'm in a plane that's going 99.9% the speed of sound and start sprinting, will I break the sound barrier?
- How stationary is a geostationary satellit?
- When did we recognize that we were inside a galaxy, and that beyond us lied an entire universe?
- What is Higgs Boson "God" Particle in Layman's terms, or at least what did it provide to science?
- Is there a way to shield a certain area on Earth so that satellites can't take photos of it?
- What does oxygen actually do in our body on a molecular level?
- Is there an evolutionary reason for arachnophobia?
- I want to donate my O- blood, but I lived in the UK during the 1990's. Which is a greater long-term health risk; Internationally banning my blood? or risking mad-cow?
- Can a liquid metal turn violet?
- What causes night sweats?
- Since radio waves travel at the speed of light, does that mean we will never have a quicker way of communicating with things in space?
- Have the amount of Dark Matter changed with the age of the universe?
- Laser etching TPU - will I produce dangerous gas?
| How the heck do jellyfish work if they have no brain or no blood? Posted: 08 Nov 2015 02:35 PM PST I can't think of any other example of a multi-cellular organism without these essential things (I mean, I'm no science student or scientist). What organizes the cells? Jellyfish really confuse me... [link] [652 comments]  |
| Posted: 08 Nov 2015 08:56 PM PST I'm just really curious to know what happens. Like when they wake up 6 months later are they still addicted? Or did their body go through withdraw when they were sleeping? Thanks for response. [link] [15 comments]  |
| Posted: 09 Nov 2015 07:22 AM PST If it doesn't why does the earth? Do all planets have a molten core? If they don't what are the circumstances for having one? [link] [3 comments]  |
| Does reading speed and comprehension decrease if you dont read for say, five or six years? Posted: 08 Nov 2015 10:38 PM PST |
| Why are the pores on the face so much larger than anywhere else on the body? Posted: 09 Nov 2015 03:52 AM PST |
| Posted: 09 Nov 2015 06:01 AM PST As we move faster, we require an exponentially larger amount of energy to continue to accelerate. Eventually, as we approach the speed of light we require an infinite amount of energy to continue accelerating, because we have mass. My question is based around the amount of energy required to accelerate and if this restriction is only applicable when comparing nearby observers or your general movement through space. We are on the earth, rotating at around 1000 mph, revolving around the sun at 67,000 mph. This is nothing compared to the nearly 830,000 mph our solar system revolves around the milky way galaxy, while scientists estimate the milky way moves at around 400,000 mph. Even if all of these effects were moving in the same direction, they wouldn't even come close to the nearly 300,000,000 miles per second of the speed of light, but they are still moving fast. When you throw a ball off a moving truck their speeds are added together. So how is it that with such a minute amount of energy we are able to walk/run in the direction the solar system is revolving around the galaxy? Even though our speed is only increasing a few miles per hour, we are already moving at incredible speeds. Shouldn't this mean that it takes us much more energy to accelerate? Also consider an extreme example, being on a body already approaching near light speeds, are we able to simply walk back and forth on that body, with no regards to the speed of light? In relation to the body, the acceleration is only minimal, but in relation to space wouldn't we be able to break the "speed limit." [link] [1 comment]  |
| Posted: 08 Nov 2015 10:39 AM PST |
| If a solid sheet of a metal were only an atom thick, would we be able to see through it? Posted: 09 Nov 2015 07:07 AM PST |
| Is it possible a powerful supernova could wipe out the earth with no way to detect its approach? Posted: 09 Nov 2015 05:28 AM PST Similar to how we can not see light coming from a distant star before it reaches us could some destructive high energy rays traveling at the speed of light destroy our planet unexpectedly? [link] [12 comments]  |
| How is a "green", environment-friendly detergent different from a regular one? Posted: 09 Nov 2015 02:23 AM PST |
| Posted: 08 Nov 2015 10:37 PM PST |
| How stationary is a geostationary satellit? Posted: 09 Nov 2015 03:35 AM PST Does a geostationary satellite orbit exactly on the same position over ground? Or are there tolerances? [link] [2 comments]  |
| When did we recognize that we were inside a galaxy, and that beyond us lied an entire universe? Posted: 08 Nov 2015 09:59 AM PST I could probably Google this but I can't find the right combo of words. Just in case my question doesn't make sense, I'll try to be more specific. When did we actually recognize that the planets and stars that we could observe were just one cluster among an infinite number of similar clusters? No need to upvote, I'm sure there's an easy answer, this just struck me while stargazing last night. [link] [20 comments]  |
| What is Higgs Boson "God" Particle in Layman's terms, or at least what did it provide to science? Posted: 08 Nov 2015 07:46 PM PST |
| Is there a way to shield a certain area on Earth so that satellites can't take photos of it? Posted: 09 Nov 2015 03:50 AM PST A friend just told me that his boss had let it slip that their area of operations (this was a mining company) is shielded from satellite cameras. He didn't ask how or even clarify what that meant, as he had a feeling it was above his pay grade. But I'm curious. Is that even possible? I'm hoping this question isn't out of line. (Also I wasn't quite sure what to flair it, so I went with my best guess.) [link] [6 comments]  |
| What does oxygen actually do in our body on a molecular level? Posted: 09 Nov 2015 12:53 AM PST I am by no means a highly educated person (culinary school was plenty for me) but biology has always peaked my curiosity and no one could every give me more of an answer than "we die without oxygen" (top notch HS bio teacher /s). Obviously our bodies need it or we die very quickly, seeing as it is a vital part of life and brain function. What I don't understand is why our body needs it so badly and what it actually does. [link] [2 comments]  |
| Is there an evolutionary reason for arachnophobia? Posted: 09 Nov 2015 02:07 AM PST Out of all the spiders or insects in the world today, very few are harmful to humans. And yet, in a percentage of the population, there is a very strong fear response to these things. Is there a plausible evolutionary basis for this? [link] [2 comments]  |
| Posted: 09 Nov 2015 04:19 AM PST I am a universal donor (O-) and want to donate my blood... Unfortunately, I lived in the UK during the early 1990's, so I am classified as a mad-cow risk. Statistically speaking, How many people's lives are lost or gained by banning my blood donation [link] [1 comment]  |
| Can a liquid metal turn violet? Posted: 08 Nov 2015 09:06 AM PST Assuming a metal has already melted (at thousands of degrees Celcius), of course. Assuming it has a ROYGBIV emission spectrum (one shade of each colour). First it turns red, then orange, then yellow. Can it turn green, then blue, and then violet? [link] [8 comments]  |
| Posted: 09 Nov 2015 04:06 AM PST I've been fighting a mild cold for the past few days. Along with the usual symptoms, I've had a slight fever as well (38 C, 100 F). During the day, I hardly notice the fever, but for the past few nights, I've woken up absolutely covered in sweat (so much so, that I've needed to change the sheets in the middle of the night). I know my body is fighting off an infection, but why does it decide the middle of the night is the best time to go into battle. [link] [comment]  |
| Posted: 09 Nov 2015 12:14 AM PST Forgive my ignorance, but in the movies and tv you see people on different planets or different parts of spacing having conversations in real time. Is this 100% unreasonable? Due to radio waves traveling at the speed of light, is that, that? [link] [22 comments]  |
| Have the amount of Dark Matter changed with the age of the universe? Posted: 08 Nov 2015 02:40 PM PST As in, if we look back in time at galaxies far away, do they seem to have as much dark matter as closer galaxies do? Shouldn't dark matter be more "clumped up" in the early days of the universe, since it hadn't expanded as much? [link] [5 comments]  |
| Laser etching TPU - will I produce dangerous gas? Posted: 09 Nov 2015 01:37 AM PST Material science question: Is it potentially dangerous to laser etch TPU (in the form of a phone case)? eg. will it fill the room with dangerous gas? I was told some plastics could not be etched as they would produce chlorine gas. Also, is just saying "TPU" too broad a scope? Is it possible that some "TPU" products are safe and others aren't? [link] [2 comments]  |
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