4
votes
Why doesn’t proton emit in nuclear fission instead of neutron emission?
I think it's based on which particles usually fission. As a rule, heavy nuclides undergo a fission. As the name suggests, these have a high mass number and we know that as the number of protons ...
- 185
4
votes
How can kinetic energy decrease and increase at the same time?
You are using an external force to move the charge. The whole problem is that in some of your considerations, you say there is an external force, but when you calculate the energy of the system, you ...
- 4,859
2
votes
Is the intensity of a light wave related to frequency of the wave?
It might help to think of throwing rocks instead of photons. Pretend blue light is made of big blue rocks. When you throw them at a target, each rock carries a lot of energy.
Red light is made of ...
- 33.3k
2
votes
Accepted
Can the four Seasons of planet Earth be defined in terms of Energy?
Sure. The seasons are defined by the total energy flux imparted by the sun onto a given hemisphere of the planet.
During summer, a given hemisphere is tilted towards the sun, so there is more incident ...
- 1,277
1
vote
A question regarding work-energy theorem
The notation you are using, or the book's, is just horribly confusing. If you just choose a better way to write things, there would not be this confusion at all.
The work done by a force over a ...
- 5,057
1
vote
Where does the energy go in this problem?
Kinetic energy is not a conserved quantity. Only the momentum of an isolated system. In this example kinetic energy is lost due to the collision between the heroes and wagon being inelastic. Both the ...
- 64.5k
1
vote
Why doesn’t proton emit in nuclear fission instead of neutron emission?
Is there any case where in a nuclear fission, proton emission happens ?
There are radioactive decay reactions which result in the emission of a proton. However, the proton is positively charged, so ...
- 42.1k
1
vote
How absorption does not translate into vibration
But I wonder why absorption(even though it increases KE of particle) does not implicitly give it more vibration in the same pattern as it had before the absorption ?
At the classical mechanics level, ...
- 231k
1
vote
Accepted
Is the intensity of a light wave related to frequency of the wave?
SI units here. We usually call $f=photons/m^2/s$ "photon flux", not "intensity". So, "intensity" $I=W/m^2/s$ is $h \nu f$. Thus, for a given intensity the flux is ...
- 15.4k
1
vote
Gravity creates heat?
and the extreme amounts of pressure and friction created from rocks pressing down on each other because of gravity.
Can I rephrase? I wouldn't say that the heat is from "pressure" or "...
- 37.3k
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