What Earth microorganisms, if any, would thrive on Mars? |
- What Earth microorganisms, if any, would thrive on Mars?
- Why do curved streamlines have a pressure gradient?
- What's the difference between alpha beta and gamma rays, and are there any other Greek-letter rays, and what is a mnemonic so I don't keep forgetting the difference?
- How do sound waves behave in in a bent, open-ended tube?
- Does a Black hole dissapate from Hawkin radiation before an object crosses The event horizon?
- Why don't we use superconductors in space probes, satellites, etc.?
- If a smoker got amnesia, would they remember they smoke and have the urge to smoke or unknowingly quit?
- There is a lot of conflict regarding whether Archaeopteryx should be classified as a theropod dinosaur or a bird. What are some of the best arguments for each side of this argument?
- Why do muscles stop working when working out?
- Why did every single species in the Homo genus except for Homo sapiens sapiens go extinct?
- How reliable is radiocarbon testing in human fossil remains, if the sample tested was exposed to high temperature via fire (field burn)?
- When another spacecraft docks with the ISS, does it change the station's orientation or movement with any noticeable effect?
- When we look at galaxies (e.g. through Hubble), we're looking back in time. Where are those galaxies now?
- How much water has been taken out of the Earth's water cycle because of bottled water/liquids being thrown away?
- How does glow in the dark work?
- Why can I see reflections on mirages?
- Do stars that burn twice as bright burn twice as fast?
- Could you theoretically change someone's opinion chemically?
- Why do some metals turn bright red and white when they are melting? Why don't they just turn to liquid like mercury does?
- What are the causes for finland being so far down (24th) on the HDI in comparison to other nordic countries?
| What Earth microorganisms, if any, would thrive on Mars? Posted: 30 Jul 2016 08:16 PM PDT Care is always taken to minimize the chance that Earth organisms get to space, but what if we didn't care about contamination? Are there are species that, if deliberately launched to Mars, would find it hospitable and be able to thrive there? [link] [comments]  |
| Why do curved streamlines have a pressure gradient? Posted: 31 Jul 2016 05:29 AM PDT Hey everyone So the common theories of of lift generation are usually discarded by professors and scientists in this field as not being complete, i.e. the Bernoulli explanation and also the newton explanation. The same transit time or the area pinching explanation doesn't hold, and understandably so. The correct explanation is shown as that whenever a streamline curves, there exists a pressure gradient, with minimum pressure at the center of the circular vortex and greatest outside. This pressure differential b/w streamlines when constructed over the entire wing explains lift, with the lower surface having a higher pressure than the upper surface. What I want to know is, why does there exist a pressure differential between the inside and outside streamline of a vortex? Additionally, in the speed-pressure relation in Bernoulli's equation, the change in speed in this case is shown as an effect of the pressure gradient, rather than a cause of it. Can anyone please shed some light on that too? Thanks Ref paper: http://iopscience.iop.org/article/10.1088/0031-9120/38/6/001/pdf [link] [comments]  |
| Posted: 31 Jul 2016 12:32 AM PDT |
| How do sound waves behave in in a bent, open-ended tube? Posted: 30 Jul 2016 08:05 PM PDT I'm trying to determine how sound changes in a tube that has a curve in it (kinda like this curve but more smooth). If I run a sine wave through a tube shaped like that, how is the sound output different from the input? Is it quieter? Is it distorted? Thank you! [link] [comments]  |
| Does a Black hole dissapate from Hawkin radiation before an object crosses The event horizon? Posted: 31 Jul 2016 04:29 AM PDT Since to an outside observer The object Will never cross The horizon due to The extreme time dilation near The hole. [link] [comments]  |
| Why don't we use superconductors in space probes, satellites, etc.? Posted: 30 Jul 2016 01:36 PM PDT Superconductors require expensive, difficult cooling on earth. But why don't space probes, spacecraft, satellites, the space station, etc., utilize the coldness of space to take advantage of superconductors—for example, for magnetic leviation systems for positioning and maneuveing elements, for high-efficiency motors (to better utilize limited solar power), or (more dramatically) for complex devices such as superconducting CPUs (utilizing Josephson junctions) or single-photon detectors? [link] [comments]  |
| Posted: 30 Jul 2016 05:56 AM PDT |
| Posted: 30 Jul 2016 06:16 PM PDT I'm in a Zoology class and we're currently discussing reptiles, birds, and the similarities between them. We discussed Archaeopteryx and how it still remains unclear as to where it should be placed, taxonomically. I'm also curious about what function its feathers may have served if it didn't use them for flying. Sources and articles would be awesome, as well. Thanks in advance for your feedback! [link] [comments]  |
| Why do muscles stop working when working out? Posted: 30 Jul 2016 09:30 AM PDT So what I am getting at for example is when repeatedly doing the same motion and exercising a muscle why does it eventually stop contracting when it's told to. I know my brain sends a signal to tell the muscle to contract but eventually the muscle can't do what it's being told. The easy explanation is your muscle is tired but that is actually going on? [link] [comments]  |
| Why did every single species in the Homo genus except for Homo sapiens sapiens go extinct? Posted: 30 Jul 2016 10:39 AM PDT From what I can gather Homo neanderthalensis for were intelligent enough to make tools out of bone and rock for example, so why couldn't they evolve alongside what would eventually become modern humans? Did our species' "merge"? [link] [comments]  |
| Posted: 30 Jul 2016 03:22 PM PDT The Sheriff's office in charge of the remains claimed that the bones were tested and found to be over 700 years old but have not produced any test results. The bone was discovered after a field burn, exposing the bone to high temperatures. The test would have been conducted in 2007. [link] [comments]  |
| Posted: 30 Jul 2016 09:10 AM PDT I know next to nothing about physics, and realize that the station is way bigger than, like the SpaceX dragon--but I was curious whether the force imparted by a docking vessel was enough to affect the station in a way that was measurable. [link] [comments]  |
| Posted: 30 Jul 2016 12:33 PM PDT If warp drive, FTL, etc were a reality and we could quickly get to other galaxies, how would we know where they are if we're seeing where they were? [link] [comments]  |
| Posted: 30 Jul 2016 10:52 AM PDT |
| How does glow in the dark work? Posted: 30 Jul 2016 08:33 AM PDT |
| Why can I see reflections on mirages? Posted: 30 Jul 2016 08:13 AM PDT Why can I see the reflections of cars and trees on mirages if there is nothing there? [link] [comments]  |
| Do stars that burn twice as bright burn twice as fast? Posted: 30 Jul 2016 02:10 PM PDT |
| Could you theoretically change someone's opinion chemically? Posted: 30 Jul 2016 11:32 AM PDT When I decide to take a different route home, there must be some chemical difference happening in my brain. If you had the instrumentation and the ability, could you induce this change in a person? [link] [comments]  |
| Posted: 30 Jul 2016 11:09 AM PDT |
| Posted: 30 Jul 2016 07:23 AM PDT |
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