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Activity 2: ANALYSIS. Observe each picture or image and classify the type of heat transfer that happens in each example.

Write the word CONDUCTION, 1. You feel the heat from the flame without touching it.

PIVOT

CONVECTION or RADIATION on 2. You prepared a cup of tea and the cup feels warm when touched.

3. A raw egg begins to fry as it hits the pan.

4. The warmth from the sun can make the sand and the water hot.

5. The food gets warm when placed in the microwave oven

6. The clothes become flat and warm when we iron.


7. Aircons are placed on high places because warm air rises and cool air sinks.

your paper.

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Sagot :

misscheska

CLASSIFYING HEAT TRANSFERS

  1. Radiation
  2. Convection
  3. Conduction
  4. Radiation
  5. Conduction
  6. Convection

//brainly.ph/question/1400265

What is Heat Transfer?

  • Heat transfer, unlike state functions, is a process function (or route function); hence, the quantity of heat transferred in a thermodynamic process that changes the state of a system relies on how that process happens, not just the net difference between the starting and final states of the process.
  • The flow of heat across a system's boundary due A temperature difference between the system and its surroundings is referred to as a temperature differential.

What is Radiation ?

  • The energy emitted by matter in the form of photons or electromagnetic waves is known as adiation heat transfer. Even in instances when there is an intervening medium, radiation can be essential. The heat transmission that occurs between a living thing and its surroundings is an example. Photons are a type of energy that is emitted by all living things. //brainly.com/question/24435827

What is Convection?

  • Convection is the flow of fluid that allows heat to be transferred from one location to another. Convective heat transfer combines the processes of conduction (heat diffusion) and advection, while being commonly regarded as a separate type of heat transmission (heat transfer by bulk fluid flow).

What is Conduction?

  • Conduction heat transfer is the transport of heat within a material by molecular excitation rather than bulk motion. Conduction heat transmission occurs mostly in solids or immobile media like at-rest fluids. //brainly.com/question/12072129

Differences

  • Conduction, Convection, and Radiation: What's the Difference? Heat is transferred between things through direct contact through conduction.The heat is transferred by convection inside the fluid.  Heat is transferred by electromagnetic waves without the need of particles in radiation. The heat transmission is caused by the temperature differential.

Their Importance

  1. Radiation - Many more ways than most people understand that radiation may be utilized to improve one's quality of life. Nuclear energy, which makes use of radioactive elements, offers a wide range of applications in areas such as power generation, medicine, industry, agriculture, and even our own homes.                                                                               Apart from the numerous natural sources of exposure, humanity's harnessing of radiation has resulted in a plethora of applications that we employ on a daily basis. Even while medical tests (such as X-rays) provide the most intentionally induced exposure, we employ radioactive compounds and radiations to sterilise food, extend its shelf life, and prevent fires in public spaces.
  2. Convection - Convection is also crucial in a variety of atmospheric processes. The entire arbitrary movement of molecules in a body is referred to as thermal energy. It has a direct link with temperature, which is determined by the quantity of random motion of an item, which correlates to the number of molecules moving in a system.Conduction - Conduction also provides warmth to birds and animals, which is extremely important in colder climates. Furthermore, metals conduct heat and electricity, and as a result of this property, we have heat and power in our houses. The ability of wood to transfer heat allows us to use it for burning.

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