What branch or branches of physics is the following?

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The discussion focuses on identifying the correct branches of physics related to various phenomena. Key points include the classification of fusion under nuclear physics, the ticking of a clock primarily as classical mechanics, and tsunamis linked to thermodynamics and geophysics. The conversation also addresses the complexities of categorizing collisions, suggesting kinematics rather than just mechanics, and debates the classification of gadgets, hinting at electromagnetism. Overall, the participants are refining their understanding of physics branches and their applications.
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Prof said that it may be more than one branches that includes the following. and I'm having a hard time knowing the difference of branches to sub branches.

Please make sure i got the right answer/s.
1. Fusion: Nuclear physics
2. Ticking of the clock: Quantum Physics,
Classical Mechanics
3. Tsunami: Thermodynamics, Geophysics
4. Heavenly Bodies: Astrophysics, Cosmology
5. Refraction of Light: Optics
6. Flowing of Water: Fluid Mechanics
7. Collision of two Cars
8. Sub Atomic Particles - Particle physics, Quantum Mechanics
9. Use of Gadgets - Engineering Physics
10. Fireworks - Mechanics
 
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saintrenz said:
2. Ticking of the clock:
Ticking suggests to me a mechanical escapement, so not quantum physics.
saintrenz said:
Collision of two Cars
Have you ever been given a problem concerning car collisions? They're very common.
saintrenz said:
Use of Gadgets
A bit vague this one. It says Use of, not Design of, so maybe involving human factors. Can you think of any branches that are concerned with those?
saintrenz said:
Fireworks
"Mechanics" seems a bit broad. Most involve propulsion, using what principles?
 
Thank You for the response, I already made some changes. Please check :)

1. Fusion: Nuclear physics
2. Ticking of the clock: Classical Mechanics
3. Tsunami: Thermodynamics, Geophysics
4. Heavenly Bodies: Astrophysics, Cosmology
5. Refraction of Light: Optics
6. Flowing of Water: Fluid Mechanics
7. Collision of two Cars - Kinematics
8. Sub Atomic Particles - Particle physics, Quantum Mechanics
9. Use of Gadgets - Quantum Mechanics
10. Fireworks - Thermodynamics
 
saintrenz said:
7. Collision of two Cars - Kinematics
Not really. Kinematics is like geometry, but moving. It is not concerned with forces, masses etc.
9. Use of Gadgets - Quantum Mechanics
how so?
 
it's mechanics then.

use of gadgets maybe electromagnetism?
 
saintrenz said:
use of gadgets maybe electromagnetism?
Did you understand my comment on this in post #2?
 

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