Is gravity weaker on the equator just because the radius is larger, or also because of a centrifugal force? |
- Is gravity weaker on the equator just because the radius is larger, or also because of a centrifugal force?
- Why is infrared radiation usually associated with heat even though UV, X ray, and gamma radiation are much higher energy?
- Why do we build larger particle colliders with bigger diameters instead smaller diameters traveled multiple times?
- If we mined the moon, how much could we extract before it's orbit started to decay?
- About 20 ants are sitting still in a group on my ceiling. Is this behaviour normal?
- Can we accurately (+/- 1 C) predict the weather one month ahead assuming we have the access to enough computational power?
- How do you measure the most accurate measurement devices?
- Are viscosity and surface tension of liquids effected by their temperature?
- What is the pysical meaning of a matrix determinant?
- Why does molten metal loses its electromagnetic properties?
- Can heat travel through vaccum?
- Why dont my headphone wires attract metals if magnetism is caused by the flow of electrons?
- Is it possible to move through the overlapping event horizons of two nearby black holes?
- Would more salt dissolve in hotter water heated under higher pressure? what's the limiting factor stopping more salt from being dissolved at greater and greater temperatures and pressures?
- At what rate does a wake move in relation to the boat creating it?
- Why do some stars produce four lines that protrude from the star whenever a photograph is taken from them?
- Since gravity is weaker at the equator, why wouldn't we launch all of our rockets from there?
- Does the size of spheres alter the void fraction in a close packing system of a fixed volume container?
- If mass can't be created, how do trees and plants grow from tiny seeds ?
- How far does the infrared of a remote reach?
- How far "up" do you need to be in order to see earth spin below you?
- Why can we see light through our eyelids when both are closed, but not when only one is closed?
- What makes the complex plane so convenient to express the Mandelbrot set with?
| Posted: 03 Jun 2017 02:49 PM PDT And if a centrifugal force also has an effect, how large is it compared to the difference in radii? [link] [comments]  |
| Posted: 03 Jun 2017 09:48 AM PDT |
| Posted: 04 Jun 2017 05:08 AM PDT The question came up after this article discussing the successor to the Large Hadron Collider. [link] [comments]  |
| If we mined the moon, how much could we extract before it's orbit started to decay? Posted: 03 Jun 2017 09:58 PM PDT |
| About 20 ants are sitting still in a group on my ceiling. Is this behaviour normal? Posted: 03 Jun 2017 06:42 PM PDT I live in Auckland, New Zealand and last night i noticed a group of ants huddled together on the ceiling not moving. After being disturbed they only dispersed very lightly. There was no evidence of a food source or hole leading somewhere. After about 14 hours they are still there. Is this behaviour normal? Either way, what is causing it? Here is a picture: http://imgur.com/AJ1OXCQ Thanks [link] [comments]  |
| Posted: 04 Jun 2017 12:00 AM PDT I was reading recently about struggle for computers and humans to generate truly random numbers. It seems like there is no random stuff happening in the nature. Yet, still my weather forecast is sometimes horribly wrong. It appears to me, that since humanity was improving their weather forecasting skills for thousands of years, we should be pretty much good at it. Assuming we have access to all computational power we need, can we predict the temperature in every location on Earth for every point of time one month ahead? [link] [comments]  |
| How do you measure the most accurate measurement devices? Posted: 03 Jun 2017 09:58 AM PDT Or more simply, if I have access to a device that measures something with a certain, known accuracy, and I have a device with an unknown accuracy that I expect to approach that of my known device, what sort of math should I be doing statistically? How is this generally handled in science/engineering? Edit: there's been one cool answer which is measuring something different that you correlate using scientific theories. However, that doesn't really explain my original (intended) question of what you do when you're measuring the SAME property directly. [link] [comments]  |
| Are viscosity and surface tension of liquids effected by their temperature? Posted: 04 Jun 2017 01:25 AM PDT Does, for example, water have a lower surface tension when it is closer to its boiling point and the molecules are beginning to speed up and act similar to gas molecules? [link] [comments]  |
| What is the pysical meaning of a matrix determinant? Posted: 04 Jun 2017 04:58 AM PDT The wikipedia page is being mysterious:
Yeah, I can compute all sorts of neat values from a square matrix, why do we need a special name for it? Now, I understand, say, eigenvectors: it's a vector that doesn't change direction when multiplied by the matrix. Ditto for eigenvalues, inverses, etc... all of them have neat descriptions of what they mean qualitatively. Yet the only tangible difference between matrices of different determinants depends on whether or not the determinant is zero. What's the big difference between a matrix of determinant 1 and determinant 2? [link] [comments]  |
| Why does molten metal loses its electromagnetic properties? Posted: 03 Jun 2017 09:23 PM PDT |
| Can heat travel through vaccum? Posted: 04 Jun 2017 12:37 AM PDT If no,then they can replace the insulator in that hot and cold bottles [link] [comments]  |
| Why dont my headphone wires attract metals if magnetism is caused by the flow of electrons? Posted: 04 Jun 2017 04:03 AM PDT |
| Is it possible to move through the overlapping event horizons of two nearby black holes? Posted: 03 Jun 2017 05:56 PM PDT And if so, what is this area called? I'd think it'd be something like a Lagrange Point, but not sure. [link] [comments]  |
| Posted: 04 Jun 2017 06:45 AM PDT |
| At what rate does a wake move in relation to the boat creating it? Posted: 04 Jun 2017 02:49 AM PDT |
| Posted: 03 Jun 2017 05:06 PM PDT |
| Since gravity is weaker at the equator, why wouldn't we launch all of our rockets from there? Posted: 04 Jun 2017 01:11 AM PDT |
| Posted: 03 Jun 2017 01:49 PM PDT Basically, I'm looking at water content in a foam (void fraction), where bubbles of similar size behave in some way like a close packed system of spheres. My question is, as the bubbles in the foam get larger, (while the cylinder the foam is flowing in remains fixed), does this affect the void space theoretically? [link] [comments]  |
| If mass can't be created, how do trees and plants grow from tiny seeds ? Posted: 04 Jun 2017 12:55 AM PDT Seeds create trees and fruit etc. If mass cant be created how can so much come from something as small as a seed ? [link] [comments]  |
| How far does the infrared of a remote reach? Posted: 04 Jun 2017 04:02 AM PDT Hello I'm trying to mess with some projectors using my phone but I was wondering what the reach is for common infrared remotes Like how many meters of air/concrete/glass can it penetrate and still be useful? The projectors I'm interested in are acers and dells. My phone is a LG G5 SE (european model). [link] [comments]  |
| How far "up" do you need to be in order to see earth spin below you? Posted: 03 Jun 2017 03:13 PM PDT I thought of the question why the earth doesn't spin below helicopter hovering still in the air and learned that the air of earth moves along with it. So how high up do you need to be in order to see the earth spin below you? [link] [comments]  |
| Why can we see light through our eyelids when both are closed, but not when only one is closed? Posted: 03 Jun 2017 05:44 PM PDT Close both your eyes and stand with a light to your right side. Now wave your hand over your right eye. You'll see the shadow of your hand through your eyelid, blocking the light. Now open your left eye. You can no longer see the "red" coming through your right eyelid, and there's no difference in light/coloration when you wave your hand in front of it. It's not picking up any of the light anymore. Why/how does this happen? [link] [comments]  |
| What makes the complex plane so convenient to express the Mandelbrot set with? Posted: 03 Jun 2017 03:13 PM PDT I understand you cannot simply substitute the complex number in x2 + c with (x,y) and get the same results, since the "y", or rather, the Imaginary axis of the complex plane functions differently than it's "x" or Real axis. But I don't have an intuitive enough sense of this difference to know why a formula for the Mandelbrot set can't be expressed so simply on a simple coordinate plane using only real numbers. I'm sure my phrasing betrays a lot more about what I misunderstand than what I understand, so if my question doesn't even make sense, then please help me clear up my initial misunderstandings! Thanks. [link] [comments]  |
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