Thermal Equation

What are the three primary ways heat energy can be transferred?

• Evaporation, Condensation, Sublimation

• Conduction, Convection, Radiation

• Absorption, Reflection, Transmission

• Melting, Freezing, Boiling

Which method of heat transfer involves direct contact between objects?

• Convection

• Radiation

• Conduction

• Insulation

How is heat energy transferred when hot air rises and cold air sinks?

• Conduction

• Convection

• Radiation

• Absorption

What happens to the rate of heat flow through a material if the distance between the hot and cold sections is increased?

• It increases.

• It decreases.

• It remains the same.

• It depends on the material's color.

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How does an increase in a material's thermal conductivity affect the rate of heat flow through it?

• The rate of heat flow decreases.

• The rate of heat flow increases.

• The rate of heat flow remains unchanged.

• The rate of heat flow first increases then decreases.

What happens to the rate of heat flow through a material if its thickness is increased?

• The rate of heat flow increases.

• The rate of heat flow decreases.

• The rate of heat flow remains unchanged.

• The rate of heat flow first decreases then increases.

What is the rate of heat flow through a glass window that is 2m x 3m and 1.4cm thick, if the outside temperature is 22°C and the inside temperature is 25°C? The thermal conductivity (K) of glass is 0.84 J/s m °C.

• 1080 J/s

• 108 J/s

• 10.8 J/s

• 1.08 J/s

If 1080 J of heat energy is transferred through a window every second, how much energy will be transferred in a month (assume 30 days)?

• 2.799 x 10^6 J

• 2.799 x 10^7 J

• 2.799 x 10^8 J

• 2.799 x 10^9 J