What is the earliest song in human history that we are not only aware of, but have some idea of how it sounded? |
- What is the earliest song in human history that we are not only aware of, but have some idea of how it sounded?
- What is the square cube law?
- Is there a speed a cell phone can go to not receive wifi or cell signal anymore?
- What exactly does a blast cap do?
- Is there a pattern in the mersenne primes?
- What would happen if a single atom of, let's say carbon, hit you at (1/2)c?
- If you were to open a can of soft drink inside a zero-gravity space station, what direction would the bubbles leave in?
- Why do we give pressors in patients with shock?
- Why don't we go straight up or down to exit the solar system?
- How do T-cells know which cells they've already inspected?
- If you were to make a hole all the way through to the mantle, what would happen?
- Would the night sky have appeared much brighter in the time of the dinosaurs?
- Do we burn more calories when ill?
- Does spacetime spin around a black hole? Not just the matter, but spacetime itself. If so, what IS spacetime and what does it mean for it to spin
- Is it possible for Jupiter to get enough mass through asteroid impacts to ignite fusion? How much more mass would it need? Is there any evidence of binary systems forming this way?
- Is the time between introduction of an antibiotic and emergence of resistance to said antibiotic longer for fully synthetic antibiotics vs. antibiotics based on natural product?
- Is light it's own element? What is a particle of light made of?
- Why does light decay?
- How common has muscular hypertrophy been, historically?
- Why does the stress-strain graph of a material round off as it breaks?
- If mountains can only form on plate boundaries, why are there so many mountain ranges in North America?
- What happens when one whips cream?
- Why is there a hole in parachutes?
| Posted: 21 May 2016 11:14 PM PDT I don't mean the earliest that modern society is simply aware of once existing through references or mentioning in early history, but the earliest song that we could at-least make an honest educated attempt of recreating the sound of. This could mean ancient sheet music of some form, or other means of accurately guessing how it sounded in person. A separate question on a similar note; Do we have any idea when humans (or our non-human ancestors) first started making music recreationally? [link] [comments]  |
| Posted: 21 May 2016 06:45 PM PDT I'm sure it's been said but explain it to me like I've never heard a word of anything remotely scientific and I'm brain dead. [link] [comments]  |
| Is there a speed a cell phone can go to not receive wifi or cell signal anymore? Posted: 21 May 2016 04:49 PM PDT If I am moving at near the speed of will I still get lte? [link] [comments]  |
| What exactly does a blast cap do? Posted: 21 May 2016 11:14 PM PDT From what I hear large explosions can be pretty difficult to detonate (such as C4). I hear physical force, raising temperature and a flame doesn't set it off (although I may have heard wrong). What does a blasting cap do to make something detonate? [link] [comments]  |
| Is there a pattern in the mersenne primes? Posted: 21 May 2016 07:42 AM PDT I saw a numberphile video on Mersenne primes, and I found out that sometimes 2 to the N - 1 is sometimes a prime. So I was wondering if there is a relationship between the Exponents, N, in Mersennes. Please explain in simple terms. [link] [comments]  |
| What would happen if a single atom of, let's say carbon, hit you at (1/2)c? Posted: 21 May 2016 11:51 AM PDT This question was inspired by a question from a few weeks ago about a tic tac at (1/100)c. I want to know if it would vaporize you or just punch a very small hole out of you. [link] [comments]  |
| Posted: 21 May 2016 10:09 AM PDT A friend was asking me the other day and after thinking for a bit i wasn't too sure. [link] [comments]  |
| Why do we give pressors in patients with shock? Posted: 21 May 2016 11:53 AM PDT If increasing systemic vascular resistance (SVR) increases the afterload, doesn't that reduce stroke volume? [link] [comments]  |
| Why don't we go straight up or down to exit the solar system? Posted: 22 May 2016 01:36 AM PDT If our solar system is on a linear plane, with everything orbiting the sun on a relatively flat field, why don't we just go straight up or down to exit the solar system? Why can't we just "hop" an asteroid fields? I don't post here often, but I figured this is the best place to get an answer. [link] [comments]  |
| How do T-cells know which cells they've already inspected? Posted: 21 May 2016 10:21 PM PDT From what I understand, T-cells are constantly traveling in the body, inspecting cells by looking for antigens. If they're self antigens, then the T-cell doesn't attack, whereas if they're non-self, they attack. My question is how does a T-cell know when it just inspected a cell? Does the T-cell leave something behind on the cell to mark it as checked or does the cell itself present something on its surface to indicate that it has just been checked? If there is no such system, then what prevents the T-cells from being stuck in a loop, and just inspecting the same cell over and over? [link] [comments]  |
| If you were to make a hole all the way through to the mantle, what would happen? Posted: 22 May 2016 05:57 AM PDT Lets assume you have a magic heat-proof drill of a ludicrously powerful shaped charge or laser or something that will make a hole, say, a couple of meters wide straight down all the way through the crust where I am in the UK. Would you get an instant volcano? Would the results be different if it were under the ocean, where the crust is thinner (or have I got that backwards?). I suspect the planet doesn't just deflate like a balloon... [link] [comments]  |
| Would the night sky have appeared much brighter in the time of the dinosaurs? Posted: 21 May 2016 09:59 AM PDT Given that the universe is expanding, and that apparent brightness of celestial bodies is governed by the inverse square law, would there have been a noticeable difference in the brightness of the night sky during, say, the early Jurassic Period? [link] [comments]  |
| Do we burn more calories when ill? Posted: 22 May 2016 04:19 AM PDT Ill is a vague term, so lets specifiy a few common types of Ill:
Some of these may cause short term weight loss, but thats probably through minimised calorie intake, and expulsion of liquid, but do we also use more calories to enhance the immune response and fight the infection? Or is the immune system under constant stress and it just tailors the response to a specific event? [link] [comments]  |
| Posted: 22 May 2016 05:32 AM PDT Also, why does lots of gravity make a person falling into a blackhole seem to be frozen in time from the perspective of an outside observer. [link] [comments]  |
| Posted: 22 May 2016 12:55 AM PDT |
| Posted: 21 May 2016 10:18 AM PDT I was just wondering if emergence of antibiotic resistance can be correlated to the origin of the drug. Eg, does resistance emerge quicker with the natural based Beta Lactams or Macolides vs. fully synthetic Fluoroquinlones or oxazolidinones. My thoughts are resistance would already exist for natural products so emergence could spread rapidly, compared to fully synthetic molecules, because resistance genes/mutation exists within the gene pool already; but that is of course just my hand-waving nonsense conjecture. [link] [comments]  |
| Is light it's own element? What is a particle of light made of? Posted: 22 May 2016 06:39 AM PDT |
| Posted: 22 May 2016 05:48 AM PDT |
| How common has muscular hypertrophy been, historically? Posted: 21 May 2016 06:30 PM PDT In modern times muscular hypertrophy is relatively common as athletes and enthusiasts have developed lifting and dietary regimens which support that physique. How common was muscular hypertrophy in each era, decade, or century? What caused the popular rise in hypertrophy as a fitness goal? What caused the rise in plausibility of attaining a hypertrophic physique? [link] [comments]  |
| Why does the stress-strain graph of a material round off as it breaks? Posted: 22 May 2016 04:20 AM PDT This diagram shows that after the Ultimate Tensile Stress is reached, the stress reduces and the extension increases until is breaks. Surely though, as something breaks its cross-sectional area reduces until it reaches zero, at which point it has disconnected. Therefore the stress (Force / Area) would increase? And so the graph should tend towards infinity at the maximum extension? [link] [comments]  |
| Posted: 21 May 2016 10:21 AM PDT According to this map, the boundaries of the North American plate stretch from the Pacific coast to the mid Atlantic, and everything I've read about mountain formation seems to indicate that mountain ranges can only form on plate boundaries, so how did the Rocky Mountains and the Appalachian Mountains form? [link] [comments]  |
| What happens when one whips cream? Posted: 22 May 2016 03:27 AM PDT |
| Why is there a hole in parachutes? Posted: 22 May 2016 02:27 AM PDT Surely the most amount of surface area on a parachute would be the best. Then why is it that most parachutes has a hole in the middle? [link] [comments]  |
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