Is Hurricane Matthew indicative of the end of the 11 year super quiet period of major North American hurricane activity or are conditions still generally unfavorable for hurricane formation? |
- Is Hurricane Matthew indicative of the end of the 11 year super quiet period of major North American hurricane activity or are conditions still generally unfavorable for hurricane formation?
- Do you get blackbody radiation from a pure gas?
- Why are there bubbles in prince Rupert's drops?
- Why do tropical cyclones / hurricanes tend not to form over the tropical waters of the south Atlantic?
- What is stopping us from using weather modeling and our understanding of physics to predict future weather for all places in the world for years out within a small margin of error?
- Why does one twin age more in the traveling twins paradox?
- What is the uncertainty of a calculated value when I know the uncertainty of the measured values going into it?
- What are particles in the holographic principle?
- Why aren't polar deserts sandy?
- What happens on the molecular level during semiconductor doping?
- Can the relativity of space and time be considered to be consequences of the constancy of the speed of light? How?
- What are the causes for a hurricane of this magnitude? (Hurricane Matthew)
- As CO2 concentrations increase and temperatures rise, will the temperature at which C3 carbon fixation is in equilibrium with photorespiration rise more or less than ambient temperature (average)?
- How do hall effect sensors in phones avoid motion induced errors?
- How do we know the shape of our galaxy?
- How are underwater currents formed and how do they remain independent of the same substance (water) around them?
- Do corvids hunt based on sight or scent?
- Why is visible light safe for animals?
- Do you need to correct for perspective when measuring velocity with a high speed camera?
| Posted: 06 Oct 2016 11:34 AM PDT |
| Do you get blackbody radiation from a pure gas? Posted: 07 Oct 2016 07:14 AM PDT What are the characteristics of a material that allow it to emit blackbody-like radiation? In a cloud of molecular gas (i.e., a star forming region), will you only get blackbody radiation from the dust? Or will you also get blackbody radiation from the gas? [link] [comments]  |
| Why are there bubbles in prince Rupert's drops? Posted: 06 Oct 2016 02:30 PM PDT physics -I am a glass artist and engineering student. I have recently been practicing prince Rupert's drops (and failing hard (I only have a one foot tall turkey fryer to quench drops (makes it hard to avoid sides and bottom with drop))). I could not help but to notice bubbles inside the drop when I knew 100% that there were none, especially of that size, in the glass before. So how on earth did they get there????? Did the Oxygen in the SiO2 get squeezed out of their bonds and manifest as a gas or something?? Because I'm pretty sure the drop doesn't open up to let any H2O in to be hydrogen or oxygen source for gas. If I could get a good response here it would seriously make my day!! I am just so curious and I have no clue what is going on. Thank you SO MUCH in advance for answering this if/when you do who ever awesome science guy or girl you are. [link] [comments]  |
| Posted: 06 Oct 2016 12:49 PM PDT I was researching hurricanes, since one is about to hit Florida. In doing so, I found a map that tracks tropical cyclones and depressions worldwide from 1946-2006. In that sixty-year period, all tropical oceanic basins (greater than about 5° latitude away from the equator) had numerous hurricanes. But the south Atlantic only had two, and neither seemed to make it beyond tropical storm strength on the Saffir-Simpson scale. Why is this? What about the south Atlantic makes it so unfavorable for tropical cyclone formation? [link] [comments]  |
| Posted: 06 Oct 2016 07:26 PM PDT |
| Why does one twin age more in the traveling twins paradox? Posted: 06 Oct 2016 08:18 PM PDT So, after reading a couple articles and having a college physics background, I'm really not understanding why the twin traveling at the speed of light ages more. My confusion is not from traveling near the speed of light, but in the fact that it seems like the duration of the trip near the speed of light plays a pivotal role in the twins aging. So, you have twin A who is at rest in a space station. Twin B leaves the station, travels out 20LY at near-C speeds, and travels 20LY back to the space station, and now they're 40 (approximately) years younger than their twin who remained behind. Here's where my lack of understanding comes in: Let's say their ship is super awesome, and they only spend "a brief period of time" (<1hr) accelerating and decelerating on either end of the trip. So, for almost the entire duration of their 40 year trip, they are coasting. If that's true, then technically they are both at rest, aside from the brief period of acceleration. Then WHY is the traveling twin older?? [link] [comments]  |
| Posted: 06 Oct 2016 04:12 PM PDT I've got the equation F = (C-B)/C. I know the uncertainty in C to be X and the uncertainty in B to be Y. What is the uncertainty in F? Thanks guys [link] [comments]  |
| What are particles in the holographic principle? Posted: 06 Oct 2016 07:11 PM PDT According to Verlinde, gravity is emergent from the holographic principle as an entropic force. According to this, attempts to find a quantum carrier of the gravitational force are fundamentally misguided and will never be successful. Taking this paradigm as given for the sake of argument, what are particles like electrons and photons in terms of the holographic principle? How do they arise? edit: I'd like to clarify that the question is asked from the perspective of the holographic principle where everything is information on screens. That is the answer I'd like to know...not presupposing other fields, nor criticizing the holographic principle. [link] [comments]  |
| Why aren't polar deserts sandy? Posted: 06 Oct 2016 11:23 AM PDT I realise there's no requirement for a desert to be sandy, but I'm wondering if there's a particular reason that the polar deserts on Earth are nearly all rock or gravel rather than having sand. Is there a reason for it, or is it just one of those things? Is a sandy polar desert on an earthlike planet possible? What conditions would need to be met for a polar desert to become sandy? [link] [comments]  |
| What happens on the molecular level during semiconductor doping? Posted: 06 Oct 2016 12:23 PM PDT |
| Posted: 06 Oct 2016 10:50 AM PDT I don't know much about this, only that space and time are 'relative' to the reference point used, and that a massless particle travels at the same speed regardless of where or when it is observed. What I do know about, is that speed is the distance traveled over the time taken to travel it. If I would want the speed to not be changed, but increase the time taken to travel the distance, then I would have to increase the distance traveled in order to do so, and vice versa. Could this be used to explain why space and time are relative to each other, if the speed of light is always the same? I'm only a year 12 student, so I guess there's probably something I haven't considered yet, so please do tell me! [link] [comments]  |
| What are the causes for a hurricane of this magnitude? (Hurricane Matthew) Posted: 06 Oct 2016 12:37 PM PDT As hurricane matthew nears florida (And the carbon levels went over 400 PPM), what would cause a category 4 hurricane of this magnitude? Does it have any correlation with global warming or Climate Change? [link] [comments]  |
| Posted: 06 Oct 2016 09:26 AM PDT With increasing global temperatures and increasing CO2 concentrations, there seem to be two contrary effects on C3 photosynthesis: CO2 + H2O + RuBP ⇔ 2 3-phosphoglycerate Higher temperature favors the reaction going to the left, with more entropy. Higher CO2 concentration favors the reaction going to the right, as per mass action law. (This might be a bit of an oversimplification of the real photorespiration process, I guess.) I guess I'm wondering which of these two effect is likely to be larger. Will higher CO2 concentrations have a larger effect than temperature increases, allowing C3 plants to move into environments previously too hot for them, or will temperature increases have a larger effect, limiting C3 plants to cooler areas? [link] [comments]  |
| How do hall effect sensors in phones avoid motion induced errors? Posted: 06 Oct 2016 12:24 PM PDT Unless something esoteric has escaped me since undergrad E&M all Hall effect sensors must operate under the Lorentz force law. I had this question a few years ago but I've forgotten the answer. We all know that F = q(E+VxB) and in the sensor its taken for granted that V is current but in the real world, people walking around with the sensor in their pocket, that V also includes the motion of the physical sensor through the earth's 'static' B. Yet the physical motion of the sensor doesn't screw up the reading and if I remember correctly there is a simple reason why. So... Why??? Does the motional induced polarization across the sensor produce an E field that cancels the effect? Example: https://www.quora.com/How-does-the-compass-on-the-iPhone-work [link] [comments]  |
| How do we know the shape of our galaxy? Posted: 06 Oct 2016 10:15 AM PDT As a corollary question, how do we know our location within our galaxy? [link] [comments]  |
| Posted: 06 Oct 2016 09:26 AM PDT Additionally, how much of an impact do estuaries (like where a fresh water river meets the ocean) and/or melting ice at/around the poles have on creating these currents? [link] [comments]  |
| Do corvids hunt based on sight or scent? Posted: 06 Oct 2016 11:28 AM PDT |
| Why is visible light safe for animals? Posted: 06 Oct 2016 09:02 AM PDT I was wondering the other day in class about this. I get that radio waves and microwaves are not harmful. As I understand it, this is because they carry too little energy/have long enough waves that they cannot excite the electrons in many materials to the next energy level. This means they pass through without interacting. I also get why high-energy UV waves, x-rays, and gamma waves can be harmful to human tissue. The waves carry so much energy that they can pull electrons off of atoms, screwing with the compounds in our cells. So what is special about visible light? Obviously the millions or billions of visible light rays bombarding our eyes are skin aren't harmful. But they are being somewhat absorbed and somewhat reflected by at least the top few layers of skin. Why wouldn't this constant excitement and decay of skin electrons be harmful? [link] [comments]  |
| Do you need to correct for perspective when measuring velocity with a high speed camera? Posted: 06 Oct 2016 07:11 AM PDT The set up is a high speed camera filming an arrow with a black / white scale as a back drop. The camera is 20ft away from the back drop, and the arrow travels 2 ft away from the back drop. Based on similar triangles, should I subtract 10% of the distance measured on the scale when determining the distance the arrow traveled? [link] [comments]  |
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