(Physics) If a marble and a bowling ball were placed in a space where there was no other gravity acting on them, or any forces at all, would the marble orbit the bowling ball? |
- (Physics) If a marble and a bowling ball were placed in a space where there was no other gravity acting on them, or any forces at all, would the marble orbit the bowling ball?
- Every winter my city alone dumps millions of pounds of salt onto the roadways. What is the environmental impact of using salt to de-ice roadways?
- Why is Current (A) an SI base unit but Charge (C) isn't?
- What tasks are faster to do with a computer that uses quantum processing (aka qubits) ? How faster it is compared to normal bits?
- Why is the tensile strength of a single strand of steel wire inversely proportional to diameter?
- Is there an easy test to see if a prediction vs time is self consistent?
- Where do i find hazard and precaution sentences?
- How does zero point energy not correlate with a temperature at absolute zero?
- How do you calculate the number of protons in solution at very small volumes? (halobacterium salinarum, for example)
- What is voltage physically with respect to electrons?
- How does your stomach know that food is already digested and can be passed down to intestine?
- "An implication of Albert Einstein's theory of general relativity is that physical space itself is not Euclidean, and Euclidean space is a good approximation for it only where the gravitational field is weak." What does this mean?
- Why do neutrons interact differently with nuclei depending on their energies?
- How do I use base rates to determine the probability that in a given population any one person has a specific trait?
- Where do human microbiota (bacteria in our bodies) come from?
- How do modern rails deal with thermal expansion?
- Does malachite have antibacterial properties?
- What does the term time-translation symmetry mean?
- Why don't computer processors have smaller, simpler, more numerous cores?
- Can sound influence human hormones?
- In a tilt gear wand, specifically the ones used to open and close blinds by turning, is there more leverage or torque grabbing and twisting near the top or near the bottom of the stick?
- What determines whether a load placed on a trailer will destabilise the vehicle towing it?
| Posted: 04 Oct 2016 10:43 PM PDT Edit: Hey guys, thanks for all of the answers! Top of r/askscience, yay! Also, to clear up some confusion, I am well aware that orbits require some sort of movement. The root of my question was to see if gravity would effect them at all! [link] [comments]  |
| Posted: 04 Oct 2016 10:04 AM PDT I assume that most of this salt ends up in the waterways, and I also see plants dying near heavily salted walkways. What are some of the larger impacts of seasonal salt dumping? [link] [comments]  |
| Why is Current (A) an SI base unit but Charge (C) isn't? Posted: 05 Oct 2016 03:14 AM PDT |
| Posted: 04 Oct 2016 07:08 PM PDT There are only a limited scenarios where quantum bits provide a improvement over conventional processing. When that applies how faster that computing is? It's like a quadratic or exponential function of number of bits? qubits are useful in brute-force attack in cryptography? (I have no knowledge over this, so the nomenclature may be all wrong!) [link] [comments]  |
| Why is the tensile strength of a single strand of steel wire inversely proportional to diameter? Posted: 05 Oct 2016 06:48 AM PDT Looking at this chart, tensile strength decreases as the diameter increases. Shouldn't the tensile strength be the same since the wires are all made from the same material? [link] [comments]  |
| Is there an easy test to see if a prediction vs time is self consistent? Posted: 05 Oct 2016 06:41 AM PDT Nate Silver at 538 has made a name for himself predicting presidential races. This year, his model seems to give a surprising amount of volatility. I'm specifically thinking of of his polls only prediction, which has gone from as high as ~90% for Clinton and as low as ~50%. I feel like there should be some way to test how plausible this level of variation is. If the model were to hit, say, 99.5% odds and later wander down to 50%, that seems like an event that should only happen one time out of 100 if we trust each prediction. In theory a time series should have many points of comparison like this, but obviously they aren't all independent of each other. And I'm not sure what the right correlation time should be (though maybe you can just estimate it from the data). So, if somebody knows of a good statistical test for a problem like this let me know. [link] [comments]  |
| Where do i find hazard and precaution sentences? Posted: 05 Oct 2016 05:40 AM PDT Im doing my first ever chemistry paper, and i was wondering were i find the hazard and precaution sentences for elements? [link] [comments]  |
| How does zero point energy not correlate with a temperature at absolute zero? Posted: 04 Oct 2016 09:25 PM PDT As above, how can kinetic energy exist (in the form of ZPE) at absolute zero without being related to a net positive temperature? Isn't temperature a measurement of the kinetic energy present in a system? [link] [comments]  |
| Posted: 05 Oct 2016 05:03 AM PDT Halobacterium salinarum is a photosynthetic archaea that generates energy from the sun through bacteriorhodopsin, not chlorophyll. more information https://biodiversityserene.wikispaces.com/Archaebacteria-Halobacterium+salinarium Using the dimensions for a halobacterium given by that website, I approximated the volume of a halobacterium to be somewhere around 7.8 x 10-15 Liters (using the volume of a cylinder). I used an internal pH of 7.26 to calculate the concentration of protons and got something on the order of 0.5 protons per halobacterium, which doesn't make sense. What's the most accurate way to calculate the number of protons in a small volume, such as an archaea, at this pH? (~7) [link] [comments]  |
| What is voltage physically with respect to electrons? Posted: 05 Oct 2016 04:12 AM PDT They say Voltage is the potential difference in energy per unit charge between two points. Charge seems to be in laymans terms the number of electrons stored on something. From the above description then I take it that one group of stored electrons (charge) can therefore have a greater energy (voltage) than another group of stored electrons. What is causing this and how does this manifest itself physically with the electrons? (whats the physical difference between a unit of charge with high voltage and the same unit of charge with low voltage)? Is it caused by lots of electrons being forced together closely to one another (ie decreased proximity makes the electrons push harder away from each other)? What is the difference between an electron with a higher energy than a lower energy? And What is physically happening when this is measured on a voltmeter? [link] [comments]  |
| How does your stomach know that food is already digested and can be passed down to intestine? Posted: 04 Oct 2016 07:59 AM PDT Title says it all. I was wondering if there is some clever thing happening or is it just digesting stuff for the same amount of time regardless of how digestable it is. [link] [comments]  |
| Posted: 04 Oct 2016 12:21 PM PDT |
| Why do neutrons interact differently with nuclei depending on their energies? Posted: 05 Oct 2016 01:44 AM PDT So I was doing some reading on neutron radiation detection and shielding, and it appears to me that depending on the material used and the energy of the neutron, the neutrons are either bounces off the nucleus or is absorbed. What is the principle behind this? [link] [comments]  |
| Posted: 04 Oct 2016 05:21 PM PDT For example, let's say 8% of a population of 1000 is blonde, 80% of a population is a brunette and 12% is other. Now lets say 92% of a population works and 8% are unemployed.How do I calculate the chances then that any given unemployed person is blonde? [link] [comments]  |
| Where do human microbiota (bacteria in our bodies) come from? Posted: 04 Oct 2016 07:29 AM PDT We have bacteria in some of our organs that help us with basic functions, but the question is: "Where do they come from?" Would a human born and grown up into a sterilized ambient develop them? If so, can we say that a human birth is not only the birth of a single living being, but the birth of a colony of them? If not, how differently would his body behave? Sorry for the amount of questions, and thank you in advance for your answers. [link] [comments]  |
| How do modern rails deal with thermal expansion? Posted: 04 Oct 2016 09:04 PM PDT I was looking at some of the faults of the hyperloop, and it seemed like thermal expansion was a big challenge. How do modern railway systems deal with this thermal expansion? [link] [comments]  |
| Does malachite have antibacterial properties? Posted: 04 Oct 2016 08:17 AM PDT The history textbook I have claims that malachite was imported by Egyptians in order to stop the bacteria in wounds. To my knowledge malachite is an ore of copper, so I'm wondering if it has antibacterial properties. If it does, why is this? Also, how would it have been used? (Maybe that last one is more appropriate for askhistory, but a brief explanation would be nice.) [link] [comments]  |
| What does the term time-translation symmetry mean? Posted: 04 Oct 2016 08:05 PM PDT I may be highly mistaken but does the term mean that time can run in both direction backwards and forwards? Or does term time-translation symmetry the opposite time can run in one direction. I would assume this is in reference equations in quantum physics. I first heard of the term in reference of space-time crystals. I think space-time crystals breaks time-translation symmetry? Would a time crystal prove backwards time travel or does it have nothing to do with time travel. As stated earlier the term confuses me. I don't know much about physics. Thanks for the response. Hopefully the question isn't dumb. [link] [comments]  |
| Why don't computer processors have smaller, simpler, more numerous cores? Posted: 04 Oct 2016 08:34 AM PDT |
| Can sound influence human hormones? Posted: 04 Oct 2016 08:15 AM PDT I'm thinking estrogen and testosterone etc. I've seen one study that showed that music decreased testosterone temporarily, even aggressive music. Is there any truth to this? Could one in theory expose themselves to specific sounds to change hormones? [link] [comments]  |
| Posted: 04 Oct 2016 07:31 AM PDT I have really big heavy blinds and my wife has trouble turning them. Would there be any difference in her turning them by grabbing the top middle or bottom of the stick? If there is why is that? [link] [comments]  |
| What determines whether a load placed on a trailer will destabilise the vehicle towing it? Posted: 04 Oct 2016 06:30 AM PDT This clip compares the effect of a disturbance of a load placed as far forward as possible on a trailer and a loaded placed as far back on a trailer. In the first example the car right's itself after the disturbance whereas in the second example the car appears to amplify the disturbance. Can somebody explain what's happening here and answer the following questions?
Thanks! [link] [comments]  |
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