Do space stations lose air from using air locks? |
- Do space stations lose air from using air locks?
- Is there any theoretical reason why the sun/moon relative sizes and distances are nearly the exact same?
- How is the instantaneous efficiency of nuclear reactors measured by nuclear power plant operators?
- When a black hole is said to be spinning, does that refer to the accretion disk or can we actually make observations about the behavior of matter below the event horizon?
- How does Mars look from the Moon, assuming that the Moon is at the point in it’s revolution where it’s closest to Mars?
- If light slows down in water, then does causality also slow down?
- How do those arm band blood pressure machines work?
- How did paleontologists come to the theory that dinosaurs are more closely related to modern birds than reptiles? Does this hold true for all dinosaurs, or does this only apply to certain species?
- If I = V/R, and we want to use the smallest amount of current in power transmission lines, then why do we use high voltage? Using the equation wouldn’t that result in high current?
- What does it mean for an electromagnetic wave to be linearly polarized?
- What kinds of geological processes could result in a desert with blue sand (lapis lazuli or azurite) over a strike slip fault?
- How do we get digits for pi in the hundreds of thousands place and actually know if they are accurate?
- How are Martian dust storms able to occur?
- How is the Hubble Telescope still finding things after 30 years?
- Why do men have nipples?
- How many X-rays are emitted and absorbed in a standard medical X-ray radiograph?
| Do space stations lose air from using air locks? Posted: 26 Jul 2019 05:15 AM PDT If an astronaut needs to repair something outside, doesn't the air in the air lock room come out with them? Wouldn't that limit the amount of times it can be used? [link] [comments]  |
| Posted: 26 Jul 2019 05:57 AM PDT It seems insanely unlikely that the sun and the moon apparent sizes are nearly identical in the sky. Is there any even theoretical reason that this happens, or is it truly pure chance? [link] [comments]  |
| How is the instantaneous efficiency of nuclear reactors measured by nuclear power plant operators? Posted: 26 Jul 2019 05:29 AM PDT |
| Posted: 26 Jul 2019 06:45 AM PDT |
| Posted: 25 Jul 2019 02:50 PM PDT |
| If light slows down in water, then does causality also slow down? Posted: 25 Jul 2019 06:24 PM PDT Nothing can travel faster than light, and my elementary understanding of the speed of light is that it's also the maximum speed at which two particles can have a causal impact on one another. With that in mind, since light slows down in water, does causality also slow down? If so, it is possible to make a solution that further slows causality? [link] [comments]  |
| How do those arm band blood pressure machines work? Posted: 25 Jul 2019 12:14 PM PDT I got a check-up today and realized I have been wondering this for basically my entire life up till this point. [link] [comments]  |
| Posted: 25 Jul 2019 03:47 PM PDT |
| Posted: 25 Jul 2019 08:15 PM PDT |
| What does it mean for an electromagnetic wave to be linearly polarized? Posted: 25 Jul 2019 06:57 PM PDT I was going through one of my textbooks from last year and found this from my waves and optics class: https://imgur.com/a/w8YbBn3 It says that when an EM wave is linearly polarized in a certain orientation, that corresponds to the plane of the electric field. Why is it the plane of the electric field in particular rather than the magnetic field or any other direction? Is that just a convention or is EM in general more "relevant" to things with electric charge? I assume that the latter could be the case because magnetism arrises from the spin of electrons, but I don't know for sure as I haven't yet taken electrodynamics. [link] [comments]  |
| Posted: 25 Jul 2019 04:55 PM PDT |
| Posted: 25 Jul 2019 05:25 AM PDT I just can not understand how it is even possible to measure anything to that sort of accuracy. furthermore the digits have virtually zero impact on the value of pi once you get that far out into the decimals so how can you even validate your findings? [link] [comments]  |
| How are Martian dust storms able to occur? Posted: 25 Jul 2019 08:20 AM PDT Winds are caused due to uneven heating of the ocean and the earth. In Mars this phenomenon obviously does not exist. So, how are massive dust storms able to take place. [link] [comments]  |
| How is the Hubble Telescope still finding things after 30 years? Posted: 25 Jul 2019 05:29 AM PDT I saw in the news today that Hubble found a huge spiraling galaxy zillions of miles away. What I don't understand is why it takes nearly 30 years to point the telescope in that direction. It's just 360 degrees to turn it slowly around and then doing that same turn on its axis to cover its 3D space. Doesn't that take like a week or two? Maybe a month? But 30 years? So no one ever pointed it in that direction for all this time? [link] [comments]  |
| Posted: 25 Jul 2019 12:57 PM PDT |
| How many X-rays are emitted and absorbed in a standard medical X-ray radiograph? Posted: 25 Jul 2019 01:35 AM PDT This seems like it should be easy to find out, but most of the data talks about dose, rather than number of photons, so I hoped someone here would be familiar with doing that conversion! [link] [comments]  |
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