A neutrino is thought to interact only through the weak force and gravity. They interact primarily, though, through the weak force (perhaps explaining the Martin/Shaw comment). Interestingly, since ...

The problem with the assumptions in your second paragraph is that space is moving, not the galaxies. Space itself can travel faster than the speed of light - that is not forbidden by general ...

To formalize the comments (now in chat here): Associated jerk is probably what you want to calculate, as it is the measure of how violently something is shaken.$^1$ Jerk is the derivative of the ...

The gravity of the galaxy$^1$ holds it together; that is what keeps the distance between stars in a galaxy expanding. In other words, the gravitational pull of the galaxy overcomes the antigravity "...

The official string theory website says this: Theoretical physics has not explained why there are three generations of particles that make up matter. Maybe string theory will come up with an answer ...

In a nutshell, yes. Think about Newton's gravity. Even you and I have some gravitational pull, even though it is tiny. The same is true for General Relativity. Even the tiniest of particles makes an ...

General relativity is a theory of gravity; as such, it makes predictions about gravity. However, general relativity does make predictions about time and physical entities such as black holes. Some of ...

An electron gun is used to shoot electrons at the ink which then gives the ink droplets a negative charge, varying based on where the ink needs to go. Then, the charged ink droplet passes between two ...

What happens during the charging process is this: During charging, an external electrical power source (the charging circuit) applies an over-voltage (a higher voltage than the battery produces, ...

I believe the answers to your question can be found in Locality and realism in contextual theories by Dick Hoekzema. If I understand it correctly, the paper does show that contextual theories must be ...

The block would be accelerating (well, technically decelerating, but you get the idea). Why? It's slowing down, i.e., the velocity is changing, and acceleration is defined as change in velocity ...

The short answer: yes. Momentum (p) = mass $\times$ velocity, which can be written using the shorthand $$p=mv$$ and as $v$ and therefore $p$ are vectors, these are bolded: $$\mathbf{p} = m\mathbf{v}$$...

The Level IV Multiverse is meant to contain all universes which can be described by different mathematical structures, according to Wikipedia. So it certainly contains universes that might have "...

Well, photons were at the Big Bang, but it wasn't light that we can now observe until the era known as recombination, about 378,000 years after the Big Bang, that photons had a practically infinite ...

Well, the Milky Way galaxy contains about 100 billion stars (which is a lower-end estimate). Around 1 out of every 1000 stars is of appropriate mass to form a black hole. So a very rough estimate is ...

You are talking about the thermodynamic arrow of time; I'll talk about this in reference to entropy. It's actually not an uncommon idea, especially in cosmology. Let's think about a video of a teacup ...

Light as a Particle The photons in the beam of light are continuously being absorbed and re-emitted by the glass atoms (though this is also true in the other mediums light slows in). The level by ...

In a nutshell, no. General relativity says that objects with mass cannot travel faster than the speed of light. Space itself can travel faster than the speed of light because it doesn't have mass. ...

One book I'd definitely recommend is John Gribbin's The Scientists. While it is a little more biographical, it does include the trial and error, the buildup, etc., as well as the stories of quite a ...

Not really. If we were made of antimatter, we would think of matter as antimatter. Antimatter is really the same as matter, just with an opposite charge and opposite lepton/baryon numbers. The laws of ...

The reason the hottest temperatures of the year are later than the solstice is because the land and oceans need time to warm up. Interestingly enough, there's a name for this phenomenon - "the lag of ...

In a word, yes. What you're doing is called sodium chloride electrolysis. A diagram of the experiment is shown below: Basically, because the salt has been heated until it melts, the sodium ions flow ...