All Questions
221
questions
3
votes
1
answer
233
views
Relationship between mass, momentum and kinetic energy
Is there any fundamental reason why (at least mathematically) momentum is the integral of mass wrt velocity and kinetic energy the integral of momentum also wrt velocity? ie
$$p= \int m \ dv = mv$$
$$...
- 133
0
votes
1
answer
52
views
Kinetic energy with respect to center of mass frame (COM) [closed]
Let there be an object having some chemicals in it. It starts moving with a uniform velocity $v$ and a chemical reaction starts happening. In this case, which of the following statement/s is/are ...
- 446
2
votes
4
answers
405
views
Mass-energy equivalence and gravitational potential energy
If mass and energy are equivalent, and if gravitational potential energy is energy, why doesn't an object have more mass when it is at a higher altitude? Does the mass-energy equivalence work for ...
- 181
0
votes
0
answers
27
views
Tightly bound energy configuration for nucleons?
In fusion, why are nucleons of the product nucleus tightly bound and in a lower energy configuration than the nucleons in the reactant nuclei? I think the reason a large amount of energy is released ...
1
vote
0
answers
57
views
Negative potential energy
In fusion of hydrogen into helium, hydrogen has negative potential energy which adds up and results in a mass defect..
Doubts:-
Why is there negative potential energy between the nucleons in a ...
- 21
1
vote
2
answers
440
views
Nuclear fusion mass defect and energy production
In researching the topic of nuclear fusion, I have a few doubts related to the mass defect, 'negative' potential energy and resultant energy released as a by-product of nuclear fusion.
When two ...
- 23
0
votes
0
answers
57
views
What is the exact ratio of dark energy to mass?
I need to know the exact ratio between mass and dark energy (total dark energy in the universe / total mass in the universe). I could only find it to 2 decimal points (0.68). I need this to make this ...
2
votes
5
answers
2k
views
Why relativistic mass of a body increases with its speed? [duplicate]
We know the formula,
$$m = m_0/(1-v^2/c^2)^{1/2}$$
since $v$ is usually way less than $c$, ($v^2/c^2$) is less than one which indicates a body's mass increases when it has a speed. Can someone please ...
- 195
15
votes
2
answers
3k
views
Has it been experimentally proven that energy causes gravity?
I know that under general relativity energy and mass are equivalent under $E=mc^2$. But has it been experimentally proven that energy alone causes gravity, for example, does a nuclear reaction ...
- 4,783
0
votes
0
answers
36
views
What is the gravitational pull of a photon? [duplicate]
I know it may seem like a stupid question, but I recently found out that because a photon has energy (obviously) then it must have a gravitational pull. I was wondering exactly what this gravitational ...
- 1
1
vote
2
answers
115
views
Internal energy bound configuration in nuclear fusion [closed]
I have read that
when a reaction occurs in which the products of the reaction are in a
less energetic state than the reactants, the kinetic energy of the
products is increased over that of the ...
- 23
0
votes
6
answers
664
views
Does the energy of the strong force have mass? [closed]
The mass of a proton is said to predominantly be "comprised" of the mass of the strong force interactions within the proton. Logically, one could conclude that the energy (the strong force ...
- 103
2
votes
2
answers
2k
views
Can't wrap my head around the energy formula being half of mass times velocity squared [duplicate]
I'm trying to understand the "Why" of this equation but can't make sense of it, my intuition breaks down.
When I think intuitively of energy, I think of "How powerful the impact will be ...
- 131
0
votes
0
answers
23
views
Why is internal energy of nucleons ∝ to binding energy? [duplicate]
In fusion , as two light nuclei fuse , the relative binding energy experienced by each nucleon is increased and hence the internal energy of the nucleons is decreased which by E=mc² causes a decrease ...
-3
votes
2
answers
66
views
Energy of particle in equilibrium [closed]
Suppose I have a mass let say a mass of M kg
Imagine, it is in equilibrium
No force is acting on it
Due to no force its energy must be zero .
But why it is said that mass at rest also has energy ...
- 395