Basically, You can tell that it wasn't an easy job. It was hard to pass.
A. Persia. Persia was acquired after Prophet Muhammad's death. Hope my answer was useful.
C.It increased trade on the Mississippi
Answer:
Heat transfer is a part of thermal engineering that deals with the generation, use, conversion, and exchange of thermal energy between physical systems.
Conduction: Transfer of heat by the direct collision of molecules.
Convection: Transfer of heat by carrying thermal energy along with the fluid being heated and moving away from the source.
Radiation: Transfer of heat by the emission of electromagnetic waves.
examples of heat transfer:
Conduction:
Touching a stove and being burned
Ice cooling down your hand
Boiling water by thrusting a red-hot piece of iron into it
Convection:
Hot air rising, cooling, and falling (convection currents)
An old-fashioned radiator (creates a convection cell in a room by emitting warm air at the top and drawing in cool air at the bottom).
Radiation:
Heat from the sun warming your face
Heat from a lightbulb
Heat from a fire
Heat from anything else which is warmer than its surroundings.