what are the four main concepts of energy transfer?

Question

i'm doing a thing for science and he wants us to tell what the four main concepts of energy transfer are and i cant find it anywhere and my parents don't know either and my teacher didn't give me a book to look it up in...

Answer 1

Basic Concepts of Energy

some basic principles of energy – measuring energy, energy conversion and storage, energy transfer, energy concentration etc.

Energy
Scientists define energy as the capacity of an entity to do work and define work as the application of a force through a distance. We can also describe this in non-scientific terms (e.g., moving furniture).

Conservation of Energy
Energy is neither created or destroyed; it changes from one form to another and can transfer from one bit of matter to another. The 1st law of thermondynamics is a keystone idea in physics and can be expressed
Change in internal energy = net heating (or cooling) +mechanical work done on a system

Forms of Energy
Mechanical Energy – kinetic (motion) and potential
Thermal – Internal thermal energy (Hidden form of mechanical energy)
Electrical – Electrostatic and electromagnetic
Chemical – Bonds between atoms
Nuclear – Based on changing the nucleus of an atom, splitting (fission) and combining (fussion) of atoms. Ultimate source of all the energy on earth (hydrogen atoms combined to make helium in the sun).

Our Energy Usage
The terms energy “production” and “consumption” are used to describe societies usage but these are not scientific - 1st law of thermodynamics tells us that energy cannot be created or destroyed.

also, another useful site
http://www.science.uwaterloo.ca/~cchieh/cact/c120/conserve.html

Answer 2

I only know of two, doing work and heat transfer


In general, the concept of energy refers to "the potential for causing changes". The word is used in several different contexts. The scientific use has a precise, well-defined meaning, whilst the many non-scientific uses often do not. (see here.)

In physics, energy is the ability to do work and has many different forms (potential, kinetic, electromagnetic, etc.) No matter what its form, physical energy has the same units as work; a force applied through a distance. The SI unit of energy, the joule, equals one newton applied through one meter, for example.

Answer 3

radiation, convection, conduction are the three methods of energy transfer. I'm not sure what the fourth would be. Convection can be free or forced, so that would make four. Check out:
http://www.efunda.com/formulae/heat_transfer/home/overview.cfm

More advanced, check out this heat transfer textbook:
http://web.mit.edu/lienhard/www/ahtt.html

Ah, but you said energy transfer. Hmm, more complicated. Are you sure the teacher didn't mean heat transfer?

Answer 4

Dee Dee Dee are 3 you do the last one