Why can I see my LED lightbulbs flicker when I see them in my periphery, but not directly? |
- Why can I see my LED lightbulbs flicker when I see them in my periphery, but not directly?
- AskScience AMA Series: We're Experts Here to Discuss Zoonotic Disease. AUA!
- Is there a meaningful difference between how we metabolize different sugars?
- How does Difference Frequency Generation work in nonlinear optics, and how is it energy conserving?
- How do the Starlink satellites in very low orbit overcome drag?
- does alzheimer’s have specific causes or does it come on randomly?
- Are human brains the most wrinkled in the animal kingdom? Or are there animals with more wrinkles than us? Would the animals have the potential to be smarter than humans?
- What is the Largest Clade with One Extant Member?
- Is glass cracking consistent? Will the same crack occur under exactly the same conditions?
- Do sparks break the sound barrier?
- Why Do Protons Cross the Membrane in a Proton-exchange Membrane Fuel Cell?
- Is the moon Titan losing its atmosphere, and if so, at what rate?
- The Pillars of Creation in the Eagle Nebula were destroyed 6,000 years ago, but the light from their destruction won't reach us for another 1,000 years. How do we know this?
- Are the scientists who conduct vaccine trials the same as the company that developed it?
- How does cosmic microwave background radiation work?
- How to calculate solar eclipse totality duration for specific locations?
- Why does enthalpy equal heat under constant pressure?
- The Galapagos are on the equator off the coast of Ecuador is that just a coincidence or does being on the equator help make the islands?
- How do pulsars have harmonics?
- Do virus' like the common cold infect brain cells?
- Do we have an idea how old animal tool use is?
- Has the male to female ratio of humans always been near one to one?
- What's the difference between sleeping and being awake? Is there a line or is it more like a gradient to awaken?
| Why can I see my LED lightbulbs flicker when I see them in my periphery, but not directly? Posted: 26 May 2021 01:38 PM PDT |
| AskScience AMA Series: We're Experts Here to Discuss Zoonotic Disease. AUA! Posted: 27 May 2021 06:00 AM PDT Zoonotic diseases, those transmitted between humans and animals, account for 75% of new or emerging infectious diseases. The future of public health depends on predicting and preventing spillover events particularly as interactions with wildlife and domestic animals increase. Join us today, May 27, at 2 PM ET (18 UT) for a discussion on zoonotic diseases, organized by the American Society for Microbiology (ASM). We'll discuss the rise of zoonotic diseases like COVID-19 and Zika, monitoring tools and technologies used to conduct surveillance, and the need for a One Health approach to human, animal, and environmental health. Ask us anything! With us today are:
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| Is there a meaningful difference between how we metabolize different sugars? Posted: 26 May 2021 06:47 PM PDT Can anyone go into detail about the metabolisms of sucrose vs glucose vs fructose? My curiosity stems from the bit of folk wisdom that Cane Sugar sodas are "better for you" than High Fructose Corn Syrup sweetened ones. Is that true? If so, how so? My interest is from a biochem/ metabolic standpoint. How do their metabolic pathways differ? [link] [comments]  |
| How does Difference Frequency Generation work in nonlinear optics, and how is it energy conserving? Posted: 27 May 2021 05:23 AM PDT I'm having trouble finding a good explanation of what is going on that is understandable for someone without background in optics. so i understand DFG is the process where w1,w2 are input, and w3 is the output, where w3=w1-w2. now, the energy diagram shows w1 getting absorbed and w2 and w3 being emitted. wouldn't that mean that the output should be both w3 AND w2? and why is w2 a required input here? is the w2 input supposed to cancel out the emission of w2 via destructive interference? that'd be my reflexive guess but i'm not seeing any mention of such interference and in this lecture the w2 emission in the energy diagram has (amplified) next to it which would be the opposite of destructive interference, if anything. so i'm missing something important here. ...halp? [link] [comments]  |
| How do the Starlink satellites in very low orbit overcome drag? Posted: 26 May 2021 10:37 PM PDT The more closely orbiting satellites have an altitude of 340km/210mi. Does atmospheric drag play a major role there? I know satellites often have a small engine to maintain orbit, but wouldn't it burn through the fuel relatively quickly? How long of a lifespan can be expected? [link] [comments]  |
| does alzheimer’s have specific causes or does it come on randomly? Posted: 26 May 2021 05:50 PM PDT |
| Posted: 26 May 2021 05:22 PM PDT I've heard in pop culture that a wrinkly brain is a smarter brain, and I was just wondering if humans had the most wrinkly brain out of all animals. Also, are there other animals whose 'brain wrinkle rating' is comparable to ours? If so, how come it seems only humans are so much more advanced than those comparable animals? [link] [comments]  |
| What is the Largest Clade with One Extant Member? Posted: 26 May 2021 04:35 PM PDT The family Ailuridae has one extant member, the red panda, is there any larger clade (like an order or something) that also only has one extant member? [link] [comments]  |
| Is glass cracking consistent? Will the same crack occur under exactly the same conditions? Posted: 26 May 2021 01:04 PM PDT Thought it would be cool to create crack patterns for aesthetical reasons in controlled areas, is this even possible? [link] [comments]  |
| Do sparks break the sound barrier? Posted: 26 May 2021 01:51 PM PDT Do sparks break the sound barrier? is that the clicking noise? When we hear thunder is that because the lightening is breaking the sound barrier? [link] [comments]  |
| Why Do Protons Cross the Membrane in a Proton-exchange Membrane Fuel Cell? Posted: 26 May 2021 07:28 PM PDT Everything I read insists that the protons from the anode cross the proton-exchange membrane to the cathode but I never see any justification. I saw electrochemical gradients mentioned once but if it's just the diffusion of protons from high concentration to low concentration, then why is oxygen required? Doesn't the recombination of protons and electrons into hydrogen on the cathode side reduce the proton concentration by itself? [link] [comments]  |
| Is the moon Titan losing its atmosphere, and if so, at what rate? Posted: 26 May 2021 03:32 PM PDT I heard that Titan's moon is losing its atmosphere, as in the Wikipedia article, "Because N2 is the primary component (98%) of Titan's atmosphere, the isotopic ratio suggests that much of the atmosphere has been lost over geologic time." How does this loss of an atmosphere compare to other planetary bodies in our Solar System, such as Earth, Venus, and Mars? Source: A. Coustenis (2005). "Formation and Evolution of Titan's Atmosphere". Space Science Reviews. 116 (1–2): 171–184 [link] [comments]  |
| Posted: 26 May 2021 08:10 AM PDT |
| Are the scientists who conduct vaccine trials the same as the company that developed it? Posted: 26 May 2021 09:41 PM PDT I've been looking around on google, but have yet to find anything that mentioned the topic. While I myself am confident in the vaccine, my mother is hesitant, and I'm looking into things to ease her doubts. A question came to mind about who conducts the trials in specific - primarily if the scientists involved have connections to the developers of the vaccine themselves, and if that thereby might be reasons to have concern. Does anyone have more information on this topic, and know where I might be able to find a source of how this is handled? [link] [comments]  |
| How does cosmic microwave background radiation work? Posted: 26 May 2021 10:59 AM PDT I understand that it's remnant energy from the Big Bang, and that it accounts for the temperature of the universe (right?). In chemistry class, we define temperature as the kinetic energy of particles in a system, but how can space have a temperature when there are no particles for energy to move? Also how is CMB just everywhere? From what I understand, energy is usually in the form of electromagnetic waves, which travel infinitely in a vacuum until they are absorbed by something. What exactly is CMB if not a traveling wave? [link] [comments]  |
| How to calculate solar eclipse totality duration for specific locations? Posted: 26 May 2021 04:10 PM PDT When I look up information about the totality of the 2024 solar eclipse over North America, all I ever see for the length of the totality is for the place where it's the longest. Is there a method for calculating how long the totality will last for a given location? I'm prepared for the math and physics to be way over my head, but be entertained and informed nonetheless. Edit: I forgot to mention that I have a layman's understanding of some of the factors, such as the Moon's speed at that point, and a vague guess that there's a relationship between latitude and duration. I'm god awful bad at math beyond grade school basics, but if you have a highly technical answer, feel free to indulge your mathematical expertise! [link] [comments]  |
| Why does enthalpy equal heat under constant pressure? Posted: 26 May 2021 12:17 PM PDT I fully understand the mathematical proof of this relationship. But I can't come up with an intuitive explaination of why this is. Does that mean that at constant pressure the whole change in energy comes from heat? [link] [comments]  |
| Posted: 26 May 2021 07:05 PM PDT |
| How do pulsars have harmonics? Posted: 26 May 2021 09:09 AM PDT Hello all, I was wondering, if pulsars rotate at an approximately solid frequency, how can we detect harmonics of this frequency that are faster than the rotation of the pulsar? [link] [comments]  |
| Do virus' like the common cold infect brain cells? Posted: 26 May 2021 10:15 AM PDT So the way I understand is that virus' infect cells and use them to poop out more of themselves and your immune system will target these infected cells. Can the common cold infect neurons in the brain and then your immune system target's these neurons? [link] [comments]  |
| Do we have an idea how old animal tool use is? Posted: 26 May 2021 12:34 PM PDT Human have obviously had a drastic change in tool use the past few million years. This is, in the grand scheme of things, a very recent development. Do we know how old animal tool use is - in primates, birds etc? I started wondering this in the context of thinking about if there are any potential "runner-up" species in terms of achieving human technological advancement, or if we think their tool use has been more static over time [link] [comments]  |
| Has the male to female ratio of humans always been near one to one? Posted: 25 May 2021 09:44 PM PDT Does the ratio change with societal mores or does society change to reflect biology? [link] [comments]  |
| Posted: 25 May 2021 09:09 PM PDT |
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