التطبيقات والاثار على نقل الطاقة الحرارية

Which method of heat transfer is the only one that can occur through empty space?

• Conduction

• Convection

• Radiation

• Evaporation

Which of the following is a direct benefit of using thermal insulation in homes?

• Increased need for air conditioning

• Higher electricity consumption

• Reduced maintenance costs for cooling and heating systems

• Faster heat transfer through walls

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How do double-glazed windows primarily prevent heat transfer?

• By allowing only conduction

• By blocking radiation

• By preventing conduction and convection through the air gap

• By increasing the surface area for heat exchange

What is the primary reason for filling the cavity between double walls with foam?

• To increase the wall's structural integrity.

• To prevent heat transfer by conduction and convection.

• To make the wall lighter.

• To absorb sound waves.

How do double-glazed windows primarily prevent heat loss?

• By reflecting sunlight.

• By preventing air leakage.

• By creating a vacuum between the glass panes.

• By absorbing heat.

What is the main function of painting a house with a white or light color?

• To make the house appear larger.

• To reflect heat radiation from the sun.

• To absorb more light.

• To protect the walls from moisture.

What is the purpose of the vacuum between the inner and outer walls of a thermos flask?

• To reduce heat loss by radiation.

• To reduce heat loss by conduction and convection.

• To make the flask lighter.

• To prevent the liquid from spilling.