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How can heat transfer due to radiation be stopped from entering a house? Explain as many methods as possible.

Choose an optimum density for porous insulations like fibres and foams which both control convection heat transfer but are so dense as to increase radiation heat transfer.

Solar radiation on windows can be reduced by reducing window area, projecting horizontal shading, and solar control coatings on windows.

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1.  Explain the process of convection. Give at least three real-life examples. How can heat transfer via convection be stopped? Give some examples of how convection is stopped in house design.

Convection is the transfer of heat by movement of particles in a heated liquid or gas.

Examples:

Boiling water - The heat passes from the burner into the pot, heating the water at the bottom. Then, this hot water rises and cooler water moves down to replace it, causing a circular motion.

Hot air balloon - A heater inside the balloon heats the air and so the air moves upward. This causes the balloon to rise because the hot air gets trapped inside. When the pilot want to descend, he releases some of the hot air and cool air takes it place, causing the balloon to lower.

Frozen material thawing - Frozen food thaws more quickly under cold running water that if it is placed in water. The action of the running water transfers heat into the food faster.

Heat transfer via convection can be stopped through the introduction of a material that is considered a bad conductor of heat and therefore an insulator to slow down and ultimately stop the transfer of heat through a liquid's particles.

Examples:

Through insulation in the walls of the house to stop the transfer of heat through air particles.

Air leaks around windows can produce convection transfer of heat and therefore must be sealed to avoid this.

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3. With radiation, electromagnetic waves carry the energy. Electromagnetic radiation comes from accelerating electric charges. On a molecular level, that’s what happens as objects warm up — their molecules vibrate harder, causing acceleration of electric charges. 

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3. With radiation, electromagnetic waves carry the energy. Electromagnetic radiation comes from accelerating electric charges. On a molecular level, that’s what happens as objects warm up — their molecules vibrate harder, causing acceleration of electric charges. 

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How is heat transferred via radiation? -  through electromagnetic waves. it also does not require a medium or an exchange in mass.
What happens when radiation is incident upon a surface? - One of three things will happen. 1 The surface will absorb it

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If double glazing has a vacuum there will be no convection. False

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When heat is said to be transferred through radiation, it is implied that the energy, in the form of vibrating particles, travels via electromagnetic waves. All states of matter can emit radiation energy whether solid or fluid (liquid, gas) due to their vibrational movement of their atoms. unlike convection and conduction, radiation heat transfer does not require a material medium to travel through. however the medium required for radiation to travel through electromagnetic is vacuum or fluid (liquid or gas). Surfaces receive incident energy and emit radiant energy.

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Convection is the circular motion the occurs when a warmer gas or liquid rises and cooler gases or liquid fall.

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2. How can heat transfer due to radiation be stopped from entering a house? Explain as many methods as possible.

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2. How can heat transfer due to radiation be stopped from entering a house? Explain as many methods as possible.

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Heat energy also leaves the house by radiation - through the walls, roof and windows.

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3. How is heat transferred via radiation. Explain what happens when radiation is incident upon a surface

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3. How is heat transferred via radiation. Explain what happens when radiation is incident upon a surface

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1. explain the process of convection. give at least three real-life example. how can heat transfer via convection be stopped? give some examples of how convection is stopped in house design.

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1. explain the process of convection. give at least three real-life example. how can heat transfer via convection be stopped? give some examples of how convection is stopped in house design.

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examples: air conditioning
boiling pot

in fluids the hotter fluid rises because it is less dense than the colder fluids.

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Reflective surfaces absorb less heat radiation and create less heat radiation. If reflective surfaces are placed within walls and ceilings then heat radiation leakage into the house will be drastically reduced.

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1. Explain the process of convection. Give at least three real life example. How can heat transfer via convection be stopped? Give some examples of how convection is stopped in house design

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1. Explain the process of convection. Give at least three real life example. How can heat transfer via convection be stopped? Give some examples of how convection is stopped in house design

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How is heat transferred via radiation? -  through electromagnetic waves. it also does not require a medium or an exchange in mass.
What happens when radiation is incident upon a surface? - One of three things will happen. 1 The surface will absorb the radiation. 2 The radiation will get transferred into other mediums. 3 The surface will reflect the radiation.

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2. how can heat transfer due to radiation be stopped from entering a house? Explain as many methods as possible as

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2. how can heat transfer due to radiation be stopped from entering a house? Explain as many methods as possible as

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hi

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Radiation is the transfer of heat through electromagnetic waves.
What happens when radiation is incident upon a surface? - One of three things will happen. 1 The surface will absorb the radiation. 2 The radiation will get transferred into other mediums. 3 The surface will reflect the radiation.