Similar to a recently asked question. If 2 cars travel at half the speed of light or more toward opposite directions, will the relative speed from one car to another be more then the speed of light? |
- Similar to a recently asked question. If 2 cars travel at half the speed of light or more toward opposite directions, will the relative speed from one car to another be more then the speed of light?
- A standard internal combustion engine burns fuel and oxygen, which burns to produce a greater number of gas molecules as well as heat. Assuming that both of these produce power, which one produces most of the power? The heat excess or the stoichiometric excess?
- Is two 50mph cars crashing same as 100mph car crashing into tree?
- Will orbits gradually become more circular over time?
- Can you feel weight distribution in a sphere?
- Has the change in languages, English for example, accelerated or decelerated in the post-broadcast era?
- Is a minute of latitude different from a minute of longitude? How much distance (at sea level) do a minute and an hour cover?
- Is there any feasible way to produce images of exoplanets thousands of lightyears away?
- How does DNA change over the course of our lives?
- How long are you contagious with COVID-19?
- Are liquids more or less dense when gases are dissolved in them?
- Are there liquids in space?
- Why do some plastics leech chemicals while others don't?
- How does under-skin become skin?
- Why do people who undergo open heart surgery often end up having short/long term memory loss?
| Posted: 30 Sep 2021 02:06 AM PDT If so, how will the time and the space work for the two cars? Will they see each other tighter? [link] [comments]  |
| Posted: 29 Sep 2021 06:22 PM PDT At a simple glance C8H18+13.5O2=8CO2+9H2O, or 14.5 gas molecules into 17 gas molecules. Is this the greater cause of pressure in the cylinder, or the heat given off and the resulting expansion (roughly online with the ideal gas law)? [link] [comments]  |
| Is two 50mph cars crashing same as 100mph car crashing into tree? Posted: 29 Sep 2021 04:55 AM PDT If two cars crash into each other going 50 miles per hour, is that the same force generated as just one car going 100 miles per hour crashing into a tree (any still object)? Say you had some pressure reader at middle of both crashes, would it read the same? Thank you! Sorry if dumb question, know very little about physics. [link] [comments]  |
| Will orbits gradually become more circular over time? Posted: 30 Sep 2021 04:37 AM PDT It's safe to say that most orbits are elliptical (I don't know if there are exceptions in this case), but over time, do they become more circular? The reason I think this would happen is that the satellite would eventually lose some of its energy from the surrounding area. I'm not saying that it would become a perfect circle, just approaching it. If this is correct, then theoretically, if infinite time passes and no outside factors affect the orbit, does it become a perfect circle? [link] [comments]  |
| Can you feel weight distribution in a sphere? Posted: 29 Sep 2021 09:55 PM PDT Let's say you have two basketballs: one is evenly filled with 1kg of dense foam, filling its entire volume. The other is filled with 1kg of steel, but this only takes up a thin shell just underneath the outside skin of the basketball. Would there be any way to tell them apart based on feel? Would they rotate differently because the weight is distributed towards the outer edges?
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| Posted: 29 Sep 2021 10:08 AM PDT In another Reddit topic, the issue of whether or not English would still be intelligible in 1,000 years was brought up and noted that English of 1,000 years ago (Old English I believe) would not make much sense to a speaker of modern English. My question is: With the advent of telephones, radio, television, and now the internet, has the rate in which languages change increased or decreased compared to the past? It seems to me that changes to regional dialects would be slower than in the past since people are no longer as isolated and can hear/speak with one another more readily, leading to a decrease in change over time. However, with the increase in exposure to other cultures (globalization) it makes me wonder if this exposure is causing its own changes to languages, and thus increasing the rate of change. [link] [comments]  |
| Posted: 29 Sep 2021 10:40 PM PDT e.g. Central Park is at 40°42′51″ N; something on the equator is at 00°00′00″ N. How far does something have to travel to reach 00°00′01″ N? [link] [comments]  |
| Is there any feasible way to produce images of exoplanets thousands of lightyears away? Posted: 29 Sep 2021 03:23 PM PDT I was wondering if there is a way to produce high-quality images of exoplanets thousands of light-years away that is pretty high definition. What would such a device look like? and would it even be possible? and What would the image quality of those distant worlds be? I know that there are some theories on how to image exoplanets close to us like alpha centauri but I want to dream big. It's just a question that was really bugging me P.S. Idk if this is supposed to be for astronomy or physics but I assume physics [link] [comments]  |
| How does DNA change over the course of our lives? Posted: 29 Sep 2021 01:39 PM PDT Does DNA change due to life experiences? Could my child be genetically better at handling certain things I've had to handle in life? [link] [comments]  |
| How long are you contagious with COVID-19? Posted: 29 Sep 2021 09:55 PM PDT |
| Are liquids more or less dense when gases are dissolved in them? Posted: 29 Sep 2021 10:37 AM PDT I have two examples here: water that has dissolved oxygen or nitrogen, and mineral acids that have their respective gases dissolved to the maximum degree at STP - for example, oleum (H2SO4 + SO3). First thought would be a decrease in density, but how does it really play out logically? I couldn't find any density results online, even for specific percentages. [link] [comments]  |
| Posted: 29 Sep 2021 07:40 AM PDT Project hail Mary had lots of interesting ideas in it, one that I've been thinking about is that a planet with different atmospheric pressure has a higher boiling point for water. I've heard that water boils at a lower temperature at high altitude and that it will spontaneously boil in a vacuum. So this begs the question, in space, without an atmosphere or gravity, do liquids exist? Can they exist? Or do all materials just sublimate back and forth between solid and gas depending on the temperature? Furthermore, the goldilocks zone would have to be wide enough to include for possibility that pressure differences could create liquid water in wider temperature ranges. (It may already of course, I've not read about it in detail) [link] [comments]  |
| Why do some plastics leech chemicals while others don't? Posted: 29 Sep 2021 04:49 AM PDT |
| How does under-skin become skin? Posted: 29 Sep 2021 02:42 AM PDT I had a blister under a callous that I peeled off, which left a gaping, stinging mess of red and hurty underflesh. Now it is no longer stinging, but not quite the same as normal skin. In several more days, it will be indistinguishable from the other skin on my hand. What is the process that happens to the under-skin that makes it become regular skin. [link] [comments]  |
| Why do people who undergo open heart surgery often end up having short/long term memory loss? Posted: 29 Sep 2021 09:20 AM PDT |
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