Question

difference energy physics and high energy physics

Answer 1

Particle physics" and "high-energy physics" are pretty much synonyms in practice. You also see the term "high-energy particle physics" which wraps both of them together. Whatever you call it, it deals with interactions between individual particles at the level of protons / neutrons / electrons / quarks / pions / etc. Usually involves experiments at high-energy accelerators like CERN and Fermilab. "Nuclear physics" is the study of the atomic nucleus as a system. It studies fission, fusion, nuclear reactions (shooting alpha particles, protons or neutrons at nuclei in order to transform them into something else or induce fission), nuclear decay (alpha, beta, gamma). A major goal is to understand the "structure" of the nucleus in terms of predicting its internal energy levels, etc. Also uses accelerators, usually with lower energies than the HEP folks use (you usually don't want to blast the target nucleus to smithereens).

Answer 2

Answer:

Physical | Definition of Physical at Dictionary.com

adjective. of or relating to the body, as distinguished from the mind or spirit. of, relating to, or resembling material things or naturethe physical universe. involving or requiring bodily contactrugby is a physical sport. of or concerned with matter and energy.