The moon rotates around its own axis at the same speed as its rotation around earth, which is why we don't see the "dark side". Is this purely coincidental or not? |
- The moon rotates around its own axis at the same speed as its rotation around earth, which is why we don't see the "dark side". Is this purely coincidental or not?
- If we could travel at 99.9% the speed of light, it would take 4 years to get to Alpha Centauri. Would the people on the spaceship feel like they were stuck on board for 4 years or would it feel shorter for them?
- What determines the speed of sound? Why is it not equal to the average speed of a particle in the given medium?
- Do electrons/energy build up at the entrance to the resistor?
- During warm periods in Earth's history (like the PETM or the Cretaceous), how much hotter were the temperature extremes as compared to today (which is around 56C)?
- Why was nuclear power originally researched?
- If you travel at 99,99% the speed of light, what happens to your cells while time appears to slow down?
- With underground nuclear explosions that create large craters with no above-ground material ejection, how is the cavity for the crater formed?
- How do we find the distance between the Earth and stars?
- What evidence is there that photons actually exist, as a particle?
- Do octopuses have dominant tentacles like people have dominant hands?
- How do you "catch a cold"?
- Is our atmosphere rotating with earth or is it stationary?
- How difficult would it be to drill into the Earth's Mantle, and what would we expect to find there?
- [Physics] If each particle is made up of 2,3,4 or 5 quarks and anti-quarks, Does that mean a particle of 12 quarks would be possible?
- On a particle level, what explains blackbody radiation?
- Is it possible that the space is also quantized?
- Do animals in the ocean have to worry about diseases as much as humans or animals on land?
- Any Jupiter experts out there?
- Are galaxies who are near one another or are neighbors, all around the same age?
| Posted: 21 Jan 2019 06:41 AM PST I'm sure there's a logical explanation I'm not seeing, or is my interpretationof "dark side wrong? [link] [comments]  |
| Posted: 20 Jan 2019 06:57 AM PST |
| Posted: 21 Jan 2019 06:51 AM PST Today I learned, that the average speed of gas molecules in the air is around 500 m/s (at a temperature of about 30° C). I thought soundwaves are particles bumping into each other progressively. This seems to be wrong of course... But what does determine the speed of sound, if not the average speed of the particles themselves? [link] [comments]  |
| Do electrons/energy build up at the entrance to the resistor? Posted: 21 Jan 2019 06:48 AM PST I know a resistor limits the amount of current that flows in a circuit, but does this cause a buildup of electrons, heat, or energy at the entrance of the resistor? [link] [comments]  |
| Posted: 20 Jan 2019 07:48 PM PST |
| Why was nuclear power originally researched? Posted: 21 Jan 2019 01:31 AM PST What was the original purpose for studying nuclear energy or nuclear fission? Was it to help man-kind originally, or was researched to create a new weapon? I am just trying to understand the historical purpose of nuclear energy and what the scientists had in mind when originally researching it. [link] [comments]  |
| Posted: 20 Jan 2019 11:22 PM PST I am torn appart between the physics or biology tag... Let's say you travel at the speed of Light (close to it atleast) and it takes you 1 year in earth time. do your bodycells also slow down aging? Let's say a 90 year old cancer Patient wants to see his grandchildren graduate or marry, would he be able to slow down his cancer by going on a trip? [link] [comments]  |
| Posted: 20 Jan 2019 07:48 PM PST This was posted in another sub: http://i.imgur.com/wMOy7fz.gifv It seems as if the explosion is entirely contained underground, and a large cavity is created that collapses with little/no ejection of material. What causes this? Compaction of surrounding earth? Something about melting/vaporization? Unseen material ejection? [link] [comments]  |
| How do we find the distance between the Earth and stars? Posted: 20 Jan 2019 11:00 PM PST We know Proxima Centauri is 4.2 light years away. We know Sirius is 8.6 light years away. How do we find and calculate these distances? [link] [comments]  |
| What evidence is there that photons actually exist, as a particle? Posted: 21 Jan 2019 06:14 AM PST I've been thinking a lot about the electromagnetic spectrum and light lately, and I am having the damnedest of a time believing that there is an elementary particle called a photon. I can believe there is quantization of electromagnetic radiation at some hf. But this is just a fragment of a cycle of a wave - not a particle, just a short pulse of energy. And goes to the wave theory of electromagnetic radiation. Is this all that a photon is supposed to be? Is it a common lie told by physics teachers that photons are particles? Like how you were lied to when you learned that newtons laws guided everything,and then they told you later about Einstein's theories. A small lie to help you get started to understand what is going on before they hit you with the big math? Or is there indeed some irrefutable physical evidence of a truly massless chargeless particle called the photon? [link] [comments]  |
| Do octopuses have dominant tentacles like people have dominant hands? Posted: 20 Jan 2019 04:00 PM PST Like, they always grab clams with that specific tentacle, or maybe it's a set of tentacles, like 4 of them are really good at everything and the other 4 are just there waiting to be useful. [link] [comments]  |
| Posted: 21 Jan 2019 04:45 AM PST Like, why do you tend to fall sick if the weather is cold and you don't keep yourself warm enough? How do you explain it biologically? Wouldn't pathogens be less active in a cold environment? [link] [comments]  |
| Is our atmosphere rotating with earth or is it stationary? Posted: 20 Jan 2019 05:58 PM PST |
| How difficult would it be to drill into the Earth's Mantle, and what would we expect to find there? Posted: 20 Jan 2019 02:24 PM PST I know the deepest hole ever drilled is something like 12km deep - the Kola Superdeep Borehole. But, with today's technology - is it possible (doesn't matter if financially viable) to drill into the Mantle? How would we know when we hit the Mantle, and would we find minerals previously undiscovered? [link] [comments]  |
| Posted: 20 Jan 2019 01:20 PM PST |
| On a particle level, what explains blackbody radiation? Posted: 20 Jan 2019 06:57 PM PST Temperature is just a measure of the system's total kinetic energy, which is related to the particles' speed. Why moving particles spontaneously emit photons, and what causes fast moving particles to emit at higher frequency? The distribution of the spectra is probably due to the statistical distribution of particle speeds, but please correct me if I'm wrong. For simplicity, you can consider the material to be a gas. [link] [comments]  |
| Is it possible that the space is also quantized? Posted: 20 Jan 2019 12:26 PM PST |
| Do animals in the ocean have to worry about diseases as much as humans or animals on land? Posted: 20 Jan 2019 12:10 PM PST |
| Any Jupiter experts out there? Posted: 20 Jan 2019 09:55 AM PST What exactly is the "core" of gaseous planets made of? And how does that impact gravity of such planets? Do things just get denser and more compact? Is there a surface? And what's the latest understanding of that massive storm? I am mesmerized by its beauty but I don't understand its composition and formation. How did gasses coalesce in such a way? [link] [comments]  |
| Are galaxies who are near one another or are neighbors, all around the same age? Posted: 20 Jan 2019 06:55 AM PST Let's take the milky way for example. Are all galaxies near the milky way or in this area of space more or less of the same age? [link] [comments]  |
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