Carbon in all forests is 638 GtC. Annual carbon emissions by humans is 9.8 GtC (1.5% of 638). Would increasing forests by 1.5% effectively make us carbon-neutral? |
- Carbon in all forests is 638 GtC. Annual carbon emissions by humans is 9.8 GtC (1.5% of 638). Would increasing forests by 1.5% effectively make us carbon-neutral?
- Atmospheric pressure is 14.7 psi - does that mean the true psi of my car tire is the difference of the tire pressure from the atmospheric pressure?
- Can you travel faster than light relative to a moving object?
- Is there a way of determining the boiling point of any(known) substance other than trying?
- How exact does the energy of a photon need to be to excite an electron?
- Is the color of a plasma due to a jump from only one shell to another, and not any other shells?
- How many Different bluetooth devices could stream music to separate earphones simultaneously in a railway carriage before running into bandwidth problems?
- Are galaxies laid out in any sort of order, or just scattered randomly?
- What unit did Isaac Newton use for force?
- If a solid is ground extremely finely, will it become a liquid?
- What percentage of known atoms are formed by stars?
- Where did STD's come from?
- How can a star turn into a black hole?
- How long do immunoglobin molecules last in the blood and are they being continuously created?
- [Geology] Is it possible to determine the concentration of CO2 in the atmosphere during a long-passed volcanic event? If so, how would it be done?
- Given that time is quantised, does it follow that collisions are imperfect?
- How does matter alter the expansion of the universe?
- Is it possible to build a truly synthetic cell, i.e. a living organism not based on bacteria or other naturally-occurring cells?
- What's stopping a commercial jet airliner from being flown into space?
- What advancements in science did Galileo make, other than revolutionizing astronomy?
| Posted: 10 Nov 2016 06:27 AM PST The broader question here is: to what extent is reforestation a viable strategy for halting climate change? This question is based off /u/PM_ME_UR_Definitions's thoughtful comment here, which includes relevant sources. [link] [comments]  |
| Posted: 09 Nov 2016 02:13 PM PST |
| Can you travel faster than light relative to a moving object? Posted: 09 Nov 2016 06:10 PM PST So if two ships are moving away from each other, each going .9 the speed of light, their relative speed to each other would be 1.8 the speed of light. So obviously it's possible to go faster than the SOL relative to another object, right?. And everything in space is moving relative to everything else. So if the earth is moving in one direction at say .01 SOL (not just our orbit but solar system and galaxy are moving as well), and a ship travelled away from it at .99, we would be traveling at light speed as far as our origin is concerned, right? Then I think, space is just empty, how can it limit your speed with no reference, but it doesn't limit it with a reference like with the two moving ships. Sorry I hope I'm making sense. [link] [comments]  |
| Is there a way of determining the boiling point of any(known) substance other than trying? Posted: 09 Nov 2016 02:00 PM PST The title really. E.g. water: can we determine the boiling point of water by any othe rmethod other than heating it until that point? [link] [comments]  |
| How exact does the energy of a photon need to be to excite an electron? Posted: 09 Nov 2016 05:59 PM PST A quick wikipedia search says that to excite a hydrogen electron from ground state to its first energy level, the photon's wavelength must be 121.6 nm. But 121.6...what? How precise does that wavelength have to really be, and why? [link] [comments]  |
| Is the color of a plasma due to a jump from only one shell to another, and not any other shells? Posted: 09 Nov 2016 02:14 PM PST In other words, can an argon plasma (purplish) show up as different colors if the electrons are excited to a "further away" shell? Everywhere I look says the colors of various gases are one color, but the presence of multiple energy levels in atoms makes me think there should be a variety of colors dependent on how much energy you are sending to the gas. [link] [comments]  |
| Posted: 10 Nov 2016 05:55 AM PST Bluetooth has a range of ca. 10 m, comparable to a railway car, and it has 79 channels and a piconet structure with up to 8 nodes per net. Streaming music in an appropriately compressed packet format should have a well defined data rate, and it should be possible to estimate how many people could use a personal bluetooth connection within a possibly very crowded railway car simultaneously without performance impairments. I get myself confused between the protocols - can anyone help out, please? [link] [comments]  |
| Are galaxies laid out in any sort of order, or just scattered randomly? Posted: 10 Nov 2016 03:30 AM PST If you look at a small section of stars they look randomly positioned, but if you zoom out far enough they are arranged in galaxies. If we could zoom out even further would we find that galaxies are arranged in some sort of massive pattern, or are they just scattered randomly throughout the universe? [link] [comments]  |
| What unit did Isaac Newton use for force? Posted: 09 Nov 2016 12:47 PM PST Sorry if this is the wrong sub, but this came up in my AP Physics class today. We decided that he probably didn't call them Newtons, but I can't find what he did call them. [link] [comments]  |
| If a solid is ground extremely finely, will it become a liquid? Posted: 09 Nov 2016 01:01 PM PST |
| What percentage of known atoms are formed by stars? Posted: 10 Nov 2016 05:51 AM PST |
| Posted: 10 Nov 2016 03:42 AM PST I've heard Evolutionary Psychologists saying that mongamy is not natural for men particularly, and to have as many sexual partners is a good survival mechanism to pass on your DNA to as many fertile women as possible. So why all the STD's, why have we not evolved to be immune to them when they prevent people from this purpose? [link] [comments]  |
| How can a star turn into a black hole? Posted: 10 Nov 2016 12:26 AM PST I know if a star collapses, it can turn into a black hole. But how can the "normal" level of gravity of a star turn into gravity so strong that even light can't escape? As far as I know the mass of the star doesn't increase when it collapses, so why does the gravitational pull increase? I thought gravity was directly linked to the mass of an object. [link] [comments]  |
| How long do immunoglobin molecules last in the blood and are they being continuously created? Posted: 10 Nov 2016 05:52 AM PST I was discussing this with a friend - it's been a few years since our immunology class and I couldn't find the answer in a book. I know that after a person gets a hepatitis B vaccine, they develop immunity as anti-Hbs immunoglobulins. I'm guessing B cells which bind to antigens in the vaccine become plasma cells and memory cells and start to secrete those immunoglobulins. My question is - if we can find anti-Hbs immunoglobulins in the blood of vaccinated people even 10 years after they were vaccinated, are those the same anti-Hbs created immediately after vaccination or do memory lymphocytes continuously create the antibodies, and would exposure to the virus cause more memory cells to activate and create more antibodies to help with the immune response? Furthermore, since there are memory cells in the circulation, would whole blood transfusion from a vaccinated person to an unvaccinated person make them immune, or would the immune system of the unvaccinated person kill the foreign lymphocytes? [link] [comments]  |
| Posted: 10 Nov 2016 01:54 AM PST Speaking mostly of the Siberian Traps eruption, but any long passed eruption will do. Would it be possible for us to measure precisely the amount of CO2 that would have been ejected into the atmosphere, or would it only be possible to estimate it? [link] [comments]  |
| Given that time is quantised, does it follow that collisions are imperfect? Posted: 09 Nov 2016 10:19 PM PST Let me explain my question: I used to make games back in the day, and I often bumped into the following issue: The screen was redrawn 60 times per second. If you would move an object, you'd move it a certain amount of pixels every frame to give the illusion of movement. But imagine the following:
At frame 34 the two balls are right next to each-other and don't collide. The next frame the balls are updated and are now intersected 14 pixels! The only way I could solve this is to calculate the precise point where and when they collided to know how they should correctly bounce. Since I read somewhere that time is also quantised (just like the game was quantised to 60 hz), I wonder if subatomic particles experience the same behaviour where they can intersect, before a collision is triggered and if this has in-fact been tested or observed. I hope the question makes sense. [link] [comments]  |
| How does matter alter the expansion of the universe? Posted: 10 Nov 2016 12:28 AM PST I often hear regarding the future of the universe that it will either expand forever, come to a stop, or reverse and collapse depending on the amount of matter there is in it. I get that matter attracts matter but why does space-time care? Does not matter just inhabit space-time but is movable independently of it? [link] [comments]  |
| Posted: 09 Nov 2016 02:50 PM PST I was discussing cell biology with a friend yesterday, specifically how so many aspects of it are poorly understood. For example even in synthetic biology, where we strive to engineer organisms "from scratch", we're really starting with a quite complex and, it turns out, not fully-defined system (bacteria or yeast, usually). Anyway, we got to talking about the possibility of engineering living organisms truly from scratch, that is, without necessarily using nucleic acids, proteins and lipids as building blocks. Is this even possible? Are there other molecules that we could imagine would form the basis of a living organism? [link] [comments]  |
| What's stopping a commercial jet airliner from being flown into space? Posted: 09 Nov 2016 09:36 PM PST With enough momentum in a 747, would it be possible to exit Earth's atmosphere? [link] [comments]  |
| What advancements in science did Galileo make, other than revolutionizing astronomy? Posted: 09 Nov 2016 03:42 PM PST I've been reading about Galileo and I'm interested in learning more about him. However, many of the sources I have read have only acknowledged his advancements in astronomy. What else did he do for science? [link] [comments]  |
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