How do women astronauts deal with periods in antigravity? |
- How do women astronauts deal with periods in antigravity?
- Are there solid planets the size of Jupiter or the sun?
- If we terraform Moon/Mars, with almost no volcanic activity, wouldn't all the mountains eventually weather away due to erosion?
- Yellowstone Plateau is rising 0.6" per year. How do you detect and measure that rate of change?
- How is infrared radiation translated into vibrational energy in an atom?
- How do anacondas' stomachs shield themselves against the sharp claws of the prey they devour?
- What actually causes cracking joints? Is there any real biological benefit?
- Why are cancer patients at a higher risk of developing blood clots?
- Is there a lagrange point at a binary system's center of mass?
- How does the experiment work where you put water on a plate, light a candle and put a glass over it? The water gets sucked into the glass, but the most common explanation is wrong.
- The stars named thousans of years ago remain visible.If the stars are moving away from Earth,why have none disappeared from view?
- Do astronomers map fixed points in space? Do we have a way to measure this?
- How did the evolution of wings happen?
- Is the quickest way to travel in space to a destination to accelerate to the mid point and de-accelerate from there?
- Is it true that octopuses extremely intelligent? In what ways are they intelligent and how do we know?
- When light hits a reflective surface such as water, what decides which individual photons passes though and which gets reflected back?
- Joule`s law states that Q=I^2*R*t. If we substitute I with Ohm`s law we get Q=(U^2*t)/R. Is heat generated proportional to the square of current or voltage?
- You know how if you put liquids of different densities in a container, they separate? What would happen if you did that in 0 gravity?
- What is the relationship between the photon and EM wave?
- Why does having a ground wire make a piece of electrical equipment safer?
| How do women astronauts deal with periods in antigravity? Posted: 19 Jul 2017 09:50 AM PDT |
| Are there solid planets the size of Jupiter or the sun? Posted: 20 Jul 2017 01:59 AM PDT Can a planet be the size of Jupiter or the sun while still being solid? By that I mean have a crust you could conceivably stand on. If a planet cannot be that large why not? [link] [comments]  |
| Posted: 19 Jul 2017 08:06 AM PDT |
| Yellowstone Plateau is rising 0.6" per year. How do you detect and measure that rate of change? Posted: 20 Jul 2017 05:17 AM PDT Data from Wikipedia, so I appreciate that the actual number may be different. But the question remains - how do scientists detect a minute change in height without using the average change over thousands of years. For example, later the article says that a portion of the caldera moved 1.5" per year between 2004 and 2008. How can you tell? [link] [comments]  |
| How is infrared radiation translated into vibrational energy in an atom? Posted: 20 Jul 2017 05:33 AM PDT I thought radiation only affects electron shells. How does it physically make an atom vibrate? Does it somehow hit the nucleus and push it? Does the vibrational energy dissipate as more infrared? How much input infrared = how much output? If it's the same then there's no energy left to vibrate anything. If it's not the same then where's the extra energy go? [link] [comments]  |
| How do anacondas' stomachs shield themselves against the sharp claws of the prey they devour? Posted: 19 Jul 2017 04:44 PM PDT Very few organisms swallow their prey as a whole leaving them no choice but to swallow all the sharp accompaniments too. I was wondering how the claws of the prey don't scratch the insides of anacondas and the like. [link] [comments]  |
| What actually causes cracking joints? Is there any real biological benefit? Posted: 19 Jul 2017 03:38 PM PDT |
| Why are cancer patients at a higher risk of developing blood clots? Posted: 19 Jul 2017 08:55 PM PDT In light of the recent news about U.S. Senator John McCain's diagnosis of glioblastoma, and his recent surgery to remove a blood clot in one of his eyes, it made me wonder why, at a biochemical level, does cancer facilitate the formation of blood clots? [link] [comments]  |
| Is there a lagrange point at a binary system's center of mass? Posted: 20 Jul 2017 06:39 AM PDT |
| Posted: 19 Jul 2017 08:42 PM PDT ("The candle burns away the oxygen" - the burning would surely lead to a similar amount of gas, or slightly more of CO and H2O are created.) [link] [comments]  |
| Posted: 20 Jul 2017 02:13 AM PDT |
| Do astronomers map fixed points in space? Do we have a way to measure this? Posted: 19 Jul 2017 08:46 PM PDT I know that we know where Earth is in relation to the sun, but I also understand the universe is expanding and all celestial bodies are hurtling through space. Do fixed points in space exist? Do they matter? Is it possible to pinpoint where I was in the universe the day I was born? [link] [comments]  |
| How did the evolution of wings happen? Posted: 20 Jul 2017 01:37 AM PDT I understand that having wings that you can fly with is an advantage over no wings at all. But how can You explain the evolutionary steps in between - little wing-type things that You can't really fly with and can't do anything useful either ? Why did evolution kept these species that have those almost-wings to evolve into fully functional wings? [link] [comments]  |
| Posted: 20 Jul 2017 04:31 AM PDT I am asking purely about the quickest way to get from point a to b in space without using any gravitational mechanics to assist you. I'm wondering if it would be quicker to accelerate for say 90% of the distance and then brake for the last 10%? All the tools I look at, for example http://convertalot.com/relativistic_star_ship_calculator.html, give the same assumption of even acceleration and braking. Thanks in advance for your help everyone :) Edit: I think I just realised the answer to this... The quickest rate you can accelerate at is the quickest rate you can decelerate at. So assuming that you are accelerating and decelerating at maximum rates then it would be the quickest way. Is this correct? [link] [comments]  |
| Posted: 19 Jul 2017 02:54 PM PDT |
| Posted: 19 Jul 2017 03:56 PM PDT |
| Posted: 19 Jul 2017 11:59 PM PDT You can get third formation out of the Joule`s law If you substitude out R, Q=IUt. In this case heat generated is directly proportional to both voltage and current. How is heat dissipated tied really with voltage and current? What I am mossing out here? [link] [comments]  |
| Posted: 19 Jul 2017 12:50 PM PDT |
| What is the relationship between the photon and EM wave? Posted: 19 Jul 2017 11:18 PM PDT I think the photon is based on the idea of EM waves, but how do you "quantize" a wave into a photon? How does the idea of a photon come about from an EM wave? [link] [comments]  |
| Why does having a ground wire make a piece of electrical equipment safer? Posted: 19 Jul 2017 03:29 PM PDT I've been searching the internet for a good answer, but I've yet to find a completely satisfying one. Anyways, the gist of what I've heard is that, if a wire inside an appliance breaks free and touches the metal container, the container of the device is now likely at the same voltage as the hot wire. Now, in theory, if I grab just a hot wire, I'm not in any danger because there's no circuit. Unless I'm also touching the return wire, there's nowhere for the current to go. Birds can stand on power lines, after all. What I've gathered, though, is that since the actual earth conducts electricity (TIL), the electricity will flow from the hot wire, through you, through the ground, and back to the power plant, which is also grounded. What I don't understand is, if I'm inside my house, standing on a hardwood or tile floor (both insulators), wearing shoes (insulators), I'm not connected to the ground, am I? It would make sense if I was standing outside in a puddle of water, but that's not typical. Furthermore, all of this also requires that the power plant is grounded, which also makes no sense. Why is the power plant even grounded in the first place? Assuming I built the power plant on a concrete block and the wires don't touch the ground, how could a current flow through the ground into the power plant? [link] [comments]  |
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