Question

Need a good definiton for Convection and Radiation! please :)

Answer 1

-- a process of heat transfer through a gas or liquid by bulk motion of hotter material into a cooler region is convection.
OR
-- Convection is the transfer of internal energy into or out of an object by the physical movement of a surrounding fluid that transfers the internal energy along with its mass.

--radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium. This includes electro-magnetic radiation such as radio waves, visible light, and x-rays, particle radiation such as α, β, and neutron radiation and acoustic radiation such as ultrasound, sound, and seismic waves.
OR
-- Radiation may also refer to energy, waves, or particles being radiated.

Answer 2

don't forget to acknowledge w/a medal or fan

Answer 3

see the second last page ..
@Hami_B