How does the area of a black hole's event horizon change with respect to its mass increase? |
- How does the area of a black hole's event horizon change with respect to its mass increase?
- How populated was the earth with Dinosaurs during the Triassic, Jurassic, Cretaceous periods?
- Can somebody explain the wall effect in a ball-drop viscometer?
- How can our brains be so energy efficient when compared to computers, and why do they not overheat?
- Why does latent heat of phase change exist?
- Is the Hydronium ion just as likely to occur as Ammonium Ion during a basic water and ammonia reaction?
- In order to escape a predator, a prey animal that moves in a herd does not have to outrun the predator to survive - just the rest of the herd. Are there any species that are known to sabotage one another while fleeing a predator to ensure their own survival?
- whats the deal with the reaction we have when we hear scratching on a chalkboard or a fork across the plate. Why do we do the thing we do? Also why does simply thinking about it sometimes trigger it?
- What would the earth look like with a 0-degree axial tilt?
- What is the theoretical limit of CPU speed?
- How can you reduce power of microwave oven?
- Can someone explain hair to me?
| How does the area of a black hole's event horizon change with respect to its mass increase? Posted: 07 Sep 2018 06:45 PM PDT I understand that the mass of a black hole increases by the same amount of the in-falling mass. Is the (spherical?) surface of the event horizon simply related to the BH's mass as it is to its "volume?" In other words, if the BH were a physical object made of some non-compressible material, say water, for every extra drop that joined the BH its volume, and therefore surface, would increase by a given amount. Double the mass/volume and the surface would increase by (I think) 2/3. Is that the same in an actual BH? Is the event horizon always spherical? Even in rotating BHs? [link] [comments]  |
| How populated was the earth with Dinosaurs during the Triassic, Jurassic, Cretaceous periods? Posted: 07 Sep 2018 08:29 AM PDT If I were to DeLorean back to the age of the Dinosaurs, what would my chances of seeing a small/medium/large dinosaur in any encounter? Would driving anywhere be like a safari in Africa or would you really have to seek out the creatures? How different was the Triassic, Jurassic, and Cretaceous periods? [link] [comments]  |
| Can somebody explain the wall effect in a ball-drop viscometer? Posted: 08 Sep 2018 02:48 AM PDT |
| How can our brains be so energy efficient when compared to computers, and why do they not overheat? Posted: 07 Sep 2018 08:14 AM PDT |
| Why does latent heat of phase change exist? Posted: 07 Sep 2018 02:53 PM PDT TL;DR I think my biggest problem is I don't know where the latent heat is stored, if not in the combined minute motion of the molecules and atoms (temperature). Is it the fact that a substance gradually converts to the new phase? Like when boiling water, the water sits at boiling temp while the most energetic molecules fly out, keeping the water at constant temperature? But if those steam molecules are still considered part of the overall volume of water being measured, and temperature is the average kinetic energy of the molecules, they would increase the temperature, so I assume that's not the case, as (thermal energy, temperature) graphs show a clear plateau at each phase change. Do gas and liquid molecules contribute less of their kinetic energy to temperature than the molecules in a solid? Or does this gradual conversion to steam not happen until the temperature passes the latent heat plateau? If so, back to my TL;DR: where does the latent heat go so that it comes back with the opposite phase change? If it is related to entropy, I would also like an explanation of that. I know gas cools as it expands and rubber bands cool down when they stop stretching, both of which I've heard explained with entropy, but it still doesn't make sense to me. [link] [comments]  |
| Posted: 07 Sep 2018 10:27 AM PDT This is probably a simple question but I'm struggling with understanding basic trends in chemical reactions. The equation in question: "NH3 + H2O = NH4+ + OH-" Why is the ammonium ion and hydroxide the product of this (reversible) reaction? Why does the hydrogen pair with the nitrogen over the oxygen? Is H3O+ also created in a lesser quantity? Is it related to oxygen being more electronegative than nitrogen? Thanks [link] [comments]  |
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| What would the earth look like with a 0-degree axial tilt? Posted: 07 Sep 2018 08:10 AM PDT Obviously there would be no seasons, but what else? Would the temperature differences between the equator and the poles be much more severe? [link] [comments]  |
| What is the theoretical limit of CPU speed? Posted: 07 Sep 2018 06:56 AM PDT When it comes to speed we say speed of light is the limit. In similar fashion what would be the maximum of speed of a CPU if only restricted by speed of light? What would be the maximum FPS a video camera can capture pictures? [link] [comments]  |
| How can you reduce power of microwave oven? Posted: 07 Sep 2018 02:48 PM PDT Isn't the wave energy of a given lenght and frequency constant? How can we reduce the power of a 1000 W microwave? I mean the frequrncy os 2.5 GHz, the wavelength i suppose is constant also. What changes then? What's different in an 600 W and 1000 W microwave oven? [link] [comments]  |
| Can someone explain hair to me? Posted: 07 Sep 2018 06:42 AM PDT I have a number of questions that all fall under the umbrella of "hair stuff."
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