Is the phrase, a star that shines twice as bright but half as long a true statement? |
- Is the phrase, a star that shines twice as bright but half as long a true statement?
- Do gas giants like Jupiter and Saturn have a "surface" somewhere down there?
- Why do matches stick to a magnet after being burnt, but not before?
- Is two identical ball shape but with different weight will fall a the same speed in air ?
- Is there agreement that birds evolved 135 Ma ago?
- If you fire a bullet out of a gun, and simultaneously drop a bullet to the ground, they will land at the same time?
- Is there a Universal Allergen? Some substance which causes an allergic reaction in EVERYONE?
- Graphene has an ultrahigh electron mobility, how does that effect the current capacity?
- In all of history, which species had the least total members?
- If the core of the sun is 15,000,000 K, why is the surface temperature only 5,772 K?
- What do storm clouds do that make them darker compared to regular, lighter clouds?
- If I soak paper in saturated salt water, will the paper conduct electricity?
- Is the strong force stronger between proton and proton than proton and neutron? If not, is it easier to eject a proton from the nucleus than a neutron?
- Can a beta radiation source change, so that it radiates for example gamma radiation?
- How do we know that Earth has a liquid outer core, but solid inner core?
- How does a computer processor generate heat?
- Are songs on the outside of a vinyl more detailed than those closer to the rotation axis?
- In a two-block system, the two blocks collide forming an inelastic collision. If kinetic energy is conserved how does the velocity of the center of mass remain the same?
- Would a box with walls made of superconductors have zero magnetic field inside of it?
- At an atomic level, what is happening when you wet a paper towel and it becomes weak and breaks easily?
- What causes light to refract and why is it so predictable?
- Massive black hole event horizon vs small black hole event horizon. Why are they different?
- Why do areas like western Scotland and Norway have such fragmented coastlines?
| Is the phrase, a star that shines twice as bright but half as long a true statement? Posted: 07 May 2017 11:14 PM PDT |
| Do gas giants like Jupiter and Saturn have a "surface" somewhere down there? Posted: 07 May 2017 01:40 PM PDT The way I imagine it now is a moon sized super dense core surrounded by massive amounts of gas. I've always been confused about this. [link] [comments]  |
| Why do matches stick to a magnet after being burnt, but not before? Posted: 08 May 2017 07:16 AM PDT |
| Is two identical ball shape but with different weight will fall a the same speed in air ? Posted: 08 May 2017 03:14 AM PDT |
| Is there agreement that birds evolved 135 Ma ago? Posted: 08 May 2017 03:13 AM PDT In this NYT article, they say:
I'm curious how they know so precisely when birds evolved. When I looked on Wikipedia I found two articles on bird fossils dated to the 135 Ma range. I'm quoting Wikipedia here but on we go. Wyleyia is known by a single worn humerus. Gallornis is known by a femur and a humerus. Is that enough to build consensus on the origin of birds? How is this grouping of birds defined? Are birds continously present in the fossil record form 135 Ma on? Because I heard in a lecture a couple of years back that the origin wasn't that certain and that avians only really bloomed agree the KT mass extinction. [link] [comments]  |
| Posted: 07 May 2017 04:49 PM PDT I was listening to Joe Rogan taking to Neil DeGrasse Tyson. They were discussing snipers & the curvature of the Earth. Then Joe says "If you are holding a bullet in your hand & drop it, and fire a gun at the same time, they will both hit the ground simultaneously" (paraphrasing) Is that true? That seems outrageous! How does that work? [link] [comments]  |
| Is there a Universal Allergen? Some substance which causes an allergic reaction in EVERYONE? Posted: 07 May 2017 05:16 PM PDT |
| Graphene has an ultrahigh electron mobility, how does that effect the current capacity? Posted: 08 May 2017 04:59 AM PDT Considering how graphene's electron mobility could reach to (200,000 cm2 V −1 s−1) could that lead to higher current flow? Can graphene carry magnitudes of current more than copper at a significantly low weight(considering the 1atom thickness x area x Density)? Considering how 1kA of current is carried by large(volume) and heavy bus bars, I can imagine graphene doing the same with a significantly lower weight. [link] [comments]  |
| In all of history, which species had the least total members? Posted: 07 May 2017 03:44 PM PDT I've been wondering lately which species, current or extinct, had the least total number of members throughout history. It's a pretty difficult thing to just try to search for online, because the only stuff that comes back is stuff about currently endangered animals. In fact, I made a reddit account (this one) just to ask someone this question. If you think about all the weird, obscure endemic species that have existed, some of them must have not had very many members of their species. Things that evolved in tiny, closed-off ecosystems (ie, Movile Cave) wouldn't have had the same numbers as things that exist/ed widely. For example, some cave-dwelling centipede that only ever has been found in one single cave may have only ever historically had a few hundred thousand members ever to exist, whereas krill has probably had quadrillions over history. So, does anyone know any specific species that fit this bill? Or is this a dumb/unanswerable question? What is, in effect, the rarest creature of all time? [link] [comments]  |
| If the core of the sun is 15,000,000 K, why is the surface temperature only 5,772 K? Posted: 07 May 2017 11:38 PM PDT What is it that keeps the surface of the sun much cooler than the core of the sun? Why do the convective and radiative zones of the sun not transfer this heat to the surface? [link] [comments]  |
| What do storm clouds do that make them darker compared to regular, lighter clouds? Posted: 07 May 2017 11:38 AM PDT |
| If I soak paper in saturated salt water, will the paper conduct electricity? Posted: 08 May 2017 03:14 AM PDT Hi there, I'm using Makey Makeys for this project where people can "hear" art by touching it. Currently, I am using graphite pencil and creating pencil-art by coloring in, which connects to the makey makey. But it gets tiring to keep coloring with 5B pencils for so long. Would soaking paper in salt water conduct electricity? (Paper will be dry later) [link] [comments]  |
| Posted: 07 May 2017 12:37 PM PDT |
| Can a beta radiation source change, so that it radiates for example gamma radiation? Posted: 08 May 2017 02:00 AM PDT |
| How do we know that Earth has a liquid outer core, but solid inner core? Posted: 07 May 2017 03:03 PM PDT |
| How does a computer processor generate heat? Posted: 07 May 2017 04:30 PM PDT |
| Are songs on the outside of a vinyl more detailed than those closer to the rotation axis? Posted: 07 May 2017 01:39 PM PDT Since the rotational speed doesn't change, the linear speed on the outer part of a vinyl is greater, right? So more information is being within a given time. Y'know, the needle will meet more "bumps" in one second when it's far from the rotation axis than when it's closer. Does this mean the music is more detailed? [link] [comments]  |
| Posted: 07 May 2017 12:07 PM PDT |
| Would a box with walls made of superconductors have zero magnetic field inside of it? Posted: 07 May 2017 01:23 PM PDT If you constructed a small box made of superconductors which completely sealed the inside of the box, would the inside have zero magnetic field even when a magnet is brought near the outside? [link] [comments]  |
| Posted: 07 May 2017 09:17 AM PDT |
| What causes light to refract and why is it so predictable? Posted: 07 May 2017 04:13 PM PDT I've read that light as an electromagnetic wave interacts with electrons in the material making them oscillate. The oscillating electrons then emit EM radiation (with a phase delay) which the initial wave interferes with. However I'm not quite sure how this results in the predicable behavior described by Snell's law. [link] [comments]  |
| Massive black hole event horizon vs small black hole event horizon. Why are they different? Posted: 07 May 2017 10:55 AM PDT Why can you theoretically cross the event horizon of a large black hole relatively unscathed, but cannot approach a small black hole's horizon without being destroyed beforehand? Shouldn't the forces felt be the same at the event horizon, hence that's why it's the horizon? [link] [comments]  |
| Why do areas like western Scotland and Norway have such fragmented coastlines? Posted: 07 May 2017 09:22 AM PDT |
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