18 Questions
What is the primary mechanism of heat transfer in the cooling system of an automobile engine?
Forced Convection
What is the relationship between the surface area and the amount of heat transferred through convection?
The heat transferred is directly proportional to the surface area
What is the Stefan-Boltzmann constant?
5.67 × 10^-8 W/(m^2·K^4)
What is the purpose of a thermos bottle?
To minimize heat transfer through conduction, convection, and radiation
What is the term for a material that absorbs all incoming radiation?
Perfect Blackbody
What is the mechanism by which a halogen cooktop stove transfers energy to a pot?
Radiation
What is the primary mechanism of heat transfer in conduction?
Collisions between energetic and less energetic molecules
What is the term for materials that conduct heat poorly?
Thermal insulators
What is the unit of thermal conductivity?
J/(s·m·Co)
What is the type of convection that occurs due to a difference in density in a fluid?
Natural convection
What is the name for updrafts of air used by glider pilots to gain altitude?
Thermals
What is the factor that does NOT affect the amount of heat conducted through a bar?
Color of the bar
What is the relationship between the heat lost by the hotter object and the heat gained by the cooler object in a calorimetry process, assuming no heat loss to the surroundings?
The heat lost by the hotter object is equal to the heat gained by the cooler object.
What determines the value of the specific heat of a gas?
The pressure or volume of the gas
What is the unit of latent heat in the SI system?
J/kg
What happens to the temperature of a mixture during a phase change, provided the system is in thermal equilibrium?
The temperature of the mixture remains constant
What is the best approach to cook spaghetti in an open pot with the least amount of energy?
Turn down the burner so the water barely boils
If sphere A has a specific heat capacity of 645 J/(kg · C°) and sphere B has a specific heat capacity of 240 J/(kg · C°), which sphere will heat up faster?
Sphere B
Learn about forced convection, how it works, and its applications in heat transfer. Understand the factors that affect the amount of heat transferred, including surface area and viscosity of fluids.
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