All Questions
221
questions
0
votes
1
answer
127
views
de Broglie wavelength for particles with mass [duplicate]
is $p=\frac{h}{\lambda}$ only true for massless particles? because generally $E=\sqrt{p^2c^2+m^2c^4}$, then if we equate it to $h\nu$ we get $$p=\sqrt{\frac{h^2}{\lambda^2}-m^2c^2}\neq\frac{h}{\lambda}...
- 1,038
0
votes
1
answer
98
views
How can the products of a higher energy fusion reaction be heavier?
I was told the mass defect of an atom is the difference in mass of the atom versus it's particles, for example:
carbon 12 is less massive than 6 protons + 6 neutrons + 6 electrons.
this negative ...
- 21
0
votes
0
answers
12
views
If incoming photons increase the mass and gravity of a black hole are they then some kind of source of gravity? [duplicate]
If incoming photons increase the mass and gravity of a black hole are they then some kind of source of gravity?I can not understand why equivalence of mass and energy lead as to say mass and energy ...
- 1,815
13
votes
6
answers
21k
views
What happens to the mass of a burned object?
If I were to burn a pile of wood weighing a hundred kilograms and I would have a big sack hanging over the burning pile. In this sack I would catch all the smoke that came from the burning pile, if ...
- 179
8
votes
4
answers
2k
views
What type of energy does the $E$ in $E=mc^2$ represent?
I am learning mass-energy equivalence, but I have been having a hard time understanding what the $E$ in $E=mc^2$ represents. Does this represent that if an object has mass, it inherently has energy ...
- 323
0
votes
3
answers
183
views
Are translational KE and rotational KE exactly analogous?
My textbook states that translational KE and rotational KE are completely analogous. The author states "They both are the energy of motion involved with the coordinated(non random) movement of ...
- 1,235
0
votes
1
answer
106
views
Mass energy equivalence, binding energy and chemical reactions [duplicate]
I recently was nuclear physics there I learned that the the actual mass of a nucleus is less than what we expect it to be (simply adding the masses of the nucleons). It is due to the release of ...
2
votes
2
answers
203
views
How can energy creat mass? [closed]
From $E=mc^2$, we know that energy can be mass. But how? Like how can particles (gluon, photon, W boson and others) create energy? What do they do? How do they move and create mass?
3
votes
1
answer
138
views
Does the speed of light in our definitions take vacuum energy into consideration?
We know that the speed of light decreases as it goes through a medium, and we also know that there is a certain vacuum energy that creates a sea of particles coming in and out of existence, which, ...
- 199
4
votes
4
answers
96
views
How does potential energy increase without increasing matter?
It's a philosopher here - not a physicist, so please bear with me.
When I increase the potential energy of a spring by compressing it, I increase its mass according to special relativity.
But mass is ...
- 41
0
votes
1
answer
42
views
Infinities of Mass, Energy, & Velocity
My layman's understanding is that photons are particles having 0 mass, which is why they are capable of moving at c (lightspeed). Does our current model of particle physics postulate the existence of ...
1
vote
2
answers
191
views
As the universe expands, how does it affect the mass of objects and therefore the gravity?
I think the mass of object would proportionately decrease as the universe expands, as the amount of matter is constant in accordance to the law of conservation of energy. If I am correct in this, ...
- 13
-1
votes
1
answer
41
views
Is an electron completely determined by its mass? [duplicate]
What I mean is, could a chunk of matter be "whittled down" or broken off from a larger chunk of matter to the point where it has the mass either exactly of an electron or close to that and ...
- 2,238
4
votes
2
answers
632
views
Is the change in Kinetic Energy not equal to the work done when mass changes at some rate?
Here the Rate of change in Kinetic energy is not equal to the the power. Please explain
0
votes
1
answer
86
views
How is the fabric of space-time curved? It bends due to energy or mass, but what causes bending? [duplicate]
When we experiment with General Relativity on Earth, a tissue bends according to the experiment due to the placement of a mass, but of course there is a gravitational pull that causes bending. If we ...
- 49