Explanation:
Conduction is the heat transfer through a stationary matter by the physical contact.
For example, the heat transferred between electric burner of stove and bottom of pan is transferred by the process of conduction.
Convection is heat transfer by macroscopic movement of the fluid. The particles of the fluid carry the current within themselves.
For example, the water is the pot is warmed overall by heat transferred by the process of convection.
Answer:
The laminar flow is generally given in high viscosity fluids such as honey or oil, it has the characteristic of flowing in an orderly manner, the walls of the tube have a zero speed while in the center it has a maximum speed.
turbulent flow is characterized by fluid velocity vectors presenting themselves in a disorderly manner and in all directions.
I attached the drawings for the velocity profile in laminar and turbulent flow.
Answer:
It's leggings. They help protect the lower legs and feet from heat hazards like molten metal and welding sparks.
Answer:
(a) Precipitation hardening
(1) The strengthening mechanism involves the hindering of dislocation motion by precipitates/particles.
(2) The hardening/strengthening effect is not retained at elevated temperatures for this process.
(4) The strength is developed by a heat treatment.
(b) Dispersion strengthening
(1) The strengthening mechanism involves the hindering of dislocation motion by precipitates/particles.
(3) The hardening/strengthening effect is retained at elevated temperatures for this process.
(5) The strength is developed without a heat treatment.
