Heat transfer
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- Heat transfer is the process of conveying thermal energy from one location to another. The ability of a material to transfer heat depends on its composition and structure, with some materials allowing heat to pass through easily while others do not. - Conductors, like metals, are excellent at transferring heat due to their tightly packed particles that readily collide and share thermal energy. Insulators have particles that are more spread out and do not transfer heat well, making them useful for preventing the transfer of thermal energy. Common examples of insulators include fiberglass insulation and thick blankets.
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Chapter 13
This document discusses different methods of heat transfer. It explains that heat flows from warmer to cooler regions. Conduction involves heat transfer through a medium without the medium moving. Good conductors like metals allow heat to move quickly, while insulators block heat transfer. Convection involves heat transfer through the movement of fluids like liquids and gases. Hot fluids rise and cooler fluids sink, circulating heat through the medium. Conductors and insulators have many applications based on their abilities to transfer or block heat.
TRANSFER OF THERMAL ENERGY.pptx
This document discusses the three main methods of heat transfer: conduction, convection, and radiation.
Conduction involves the transfer of thermal energy between molecules in direct contact. Convection involves the transfer of heat by the circulation of fluids like gases and liquids. Radiation involves the emission and absorption of electromagnetic waves and can occur through a vacuum.
Various materials are classified as good or poor conductors based on their ability to transfer heat via conduction. Insulators are poor conductors that reduce heat transfer. Convection examples include ocean currents and heating/cooling systems. Radiation examples demonstrate how color affects heat absorption and emission. Proper insulation of homes reduces heat loss or gain.
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Materials such as silver, copper, and gold are good conductors of heat, while glass, rubber, and paper are poor conductors or insulators. Conductors transfer heat through direct contact, while insulators prevent heat transfer. Insulators are used in applications like pot holders, house construction, and insulation to reduce heat transfer. The three main methods of heat transfer are conduction, convection, and radiation.
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The document discusses the three main methods of heat transfer: conduction, convection, and radiation. Conduction involves the transfer of kinetic energy between particles through direct contact. Convection involves the transfer of heat by the circulation of fluids like gases and liquids. Radiation involves the transfer of energy through electromagnetic waves and does not require a medium. The document provides examples of how these three methods transfer heat in different materials and systems.
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Heat and electricity are forms of energy that can be transferred through conductors. Good conductors of heat and electricity, like metals, allow for the easy movement of atoms and electrons. Poor conductors, or insulators, tightly bind their electrons and do not readily transmit heat or electricity. Common good conductors include silver, copper, aluminum, and gold, while materials like cork, paper, fabric, rubber, ceramics, leather, and wood are typically good insulators.
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Heat always flows from warmer materials to cooler ones. When warmer and cooler objects are brought together, heat transfers from the warmer objects to the cooler ones until they reach the same temperature. Thermal energy can be transferred through conduction, convection, or radiation. Conduction occurs when thermal energy flows through direct contact between objects as their particles vibrate, such as from a hot mug to a person's hands. Materials that allow heat to flow easily are conductors like metals, while insulators like plastic, wood, rubber, and glass impede heat transfer. Air is also a good insulator and fluffy insulation placed in walls uses many air spaces to slow heat loss from buildings.
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Heat is a form of energy that is transferred between objects by conduction, convection, or radiation. Conduction involves direct contact between objects as heat is transferred by molecular motion. Convection involves the transfer of heat by fluid motion, such as hot air rising. Radiation transfers heat through electromagnetic waves without contact between objects. Heat transfer continues from hotter to colder objects by these three methods until thermal equilibrium is reached.
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A powerpoint presentation showing the different modes of transfer of heat - Conduction, Convection and Radiation - with daily life examples of each
Recommended
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This document discusses different methods of heat transfer. It explains that heat flows from warmer to cooler regions. Conduction involves heat transfer through a medium without the medium moving. Good conductors like metals allow heat to move quickly, while insulators block heat transfer. Convection involves heat transfer through the movement of fluids like liquids and gases. Hot fluids rise and cooler fluids sink, circulating heat through the medium. Conductors and insulators have many applications based on their abilities to transfer or block heat.
TRANSFER OF THERMAL ENERGY.pptx
This document discusses the three main methods of heat transfer: conduction, convection, and radiation.
Conduction involves the transfer of thermal energy between molecules in direct contact. Convection involves the transfer of heat by the circulation of fluids like gases and liquids. Radiation involves the emission and absorption of electromagnetic waves and can occur through a vacuum.
Various materials are classified as good or poor conductors based on their ability to transfer heat via conduction. Insulators are poor conductors that reduce heat transfer. Convection examples include ocean currents and heating/cooling systems. Radiation examples demonstrate how color affects heat absorption and emission. Proper insulation of homes reduces heat loss or gain.
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Materials such as silver, copper, and gold are good conductors of heat, while glass, rubber, and paper are poor conductors or insulators. Conductors transfer heat through direct contact, while insulators prevent heat transfer. Insulators are used in applications like pot holders, house construction, and insulation to reduce heat transfer. The three main methods of heat transfer are conduction, convection, and radiation.
conduction_convection_ and radiation.ppt
The document discusses the three main methods of heat transfer: conduction, convection, and radiation. Conduction involves the transfer of kinetic energy between particles through direct contact. Convection involves the transfer of heat by the circulation of fluids like gases and liquids. Radiation involves the transfer of energy through electromagnetic waves and does not require a medium. The document provides examples of how these three methods transfer heat in different materials and systems.
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Heat and electricity are forms of energy that can be transferred through conductors. Good conductors of heat and electricity, like metals, allow for the easy movement of atoms and electrons. Poor conductors, or insulators, tightly bind their electrons and do not readily transmit heat or electricity. Common good conductors include silver, copper, aluminum, and gold, while materials like cork, paper, fabric, rubber, ceramics, leather, and wood are typically good insulators.
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Heat always flows from warmer materials to cooler ones. When warmer and cooler objects are brought together, heat transfers from the warmer objects to the cooler ones until they reach the same temperature. Thermal energy can be transferred through conduction, convection, or radiation. Conduction occurs when thermal energy flows through direct contact between objects as their particles vibrate, such as from a hot mug to a person's hands. Materials that allow heat to flow easily are conductors like metals, while insulators like plastic, wood, rubber, and glass impede heat transfer. Air is also a good insulator and fluffy insulation placed in walls uses many air spaces to slow heat loss from buildings.
modesoftransferofheat-160103051008.pdf
Heat is a form of energy that is transferred between objects by conduction, convection, or radiation. Conduction involves direct contact between objects as heat is transferred by molecular motion. Convection involves the transfer of heat by fluid motion, such as hot air rising. Radiation transfers heat through electromagnetic waves without contact between objects. Heat transfer continues from hotter to colder objects by these three methods until thermal equilibrium is reached.
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Unit c - 2.4 & 2.5 -- conduction, convection, and radiation
The document discusses the three main types of heat transfer: conduction, convection, and radiation.
Conduction involves the direct transfer of kinetic energy between particles in contact with each other, such as a metal spoon in hot chocolate. Convection involves the circulation of heated particles within fluids like liquids and gases. Radiation transfers heat through electromagnetic waves and does not require the movement of particles.
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This document discusses different methods of thermal energy transfer: conduction, convection, and radiation.
[1] Thermal conduction involves the transfer of kinetic energy between particles in direct contact. Metals are good conductors as their free electrons can rapidly transfer energy. Insulators have trapped pockets of air that slow conduction.
[2] Convection relies on the actual movement of heated liquid or gas particles. Circulation patterns in liquids and winds in the atmosphere transfer thermal energy over distances.
[3] Radiation involves the emission and absorption of electromagnetic waves and does not require a medium for transfer. All objects radiate energy based on their temperature, with better emitters also being good absorbers.
4 thermal energy on the move
The document discusses the three main ways that thermal energy can be transferred: conduction, convection, and radiation. Conduction involves the direct contact and transfer of energy between particles. Convection involves the bulk movement of matter as fluid particles move from one location to another, carrying energy with them. Radiation involves the transfer of energy in the form of waves and does not require matter. Examples are provided for each type of thermal energy transfer.
Day 4 - Heat.pptx
Transfer of heat occurs when heat flows from a hotter object to a colder object. Conduction is the transfer of heat through direct contact between objects without the movement of material. In conduction, heat transfers from the hotter end of an object like a metal spoon to the colder end. Good conductors like metals are used for cooking utensils because they conduct heat quickly, while poor conductors like fur and wool are used as insulation to prevent unwanted heat transfer.
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Heat is the thermal energy that flows from an object at higher temperature to an object at lower temperature.
The transfer of heat energy from one object to the other is called transmission of heat. Heat energy transfers in three ways,
1. Conduction
2. Convection
3. Radiation
Conduction
If one end of a metal rod is heated with a flame,
the other end will also get heated up after a while. The heat energy is transferred from one end of the rod to the other without the actual movement of particles (atoms or molecules) of the rod. Such a mode of transmission of heat is called conduction.
The transfer of heat through matter without the actual movement of particles from their position is called conduction.
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Why metals are better conductors than non-metals?
All solids (metals and non-metals) are made of tiny particles called molecules. But, some solids conduct heat better than others. Put a metal and a plastic spoon in hot water. Which one is a good conductor of heat, metal or plastic? When both spoons receive heat energy, the particles (atoms or molecules) at the hot end of each spoon vibrate fast and collide into neighbouring particles. These particles transfer heat energy to next neighboring particles.
Particles in metals are packed more closely together than non-metals. Metals can transmit heat energy more readily than non-metals (wood, plastic, etc.). The presence of free electrons also speeds up the transfer of heat in metals. When the metal spoon gets heated, the free electrons gain kinetic energy and move farther towards the colder parts of the metal spoon. They collide the atoms in the colder parts and transfer heat energy to them. In metals, heat energy is transferred from one place to another both by the vibrations of particles as well as by the movement of free electrons. That is why metals are good conductors of heat than non-metals(insulators).
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The document describes an experiment to demonstrate the conduction of heat through metal. In the experiment, drawing pins are attached to a metal rod using Vaseline. When the rod is heated with a Bunsen burner, the heat conducted through the metal causes the Vaseline to melt and the pins to fall off. The document explains that heat flows through metals by the movement of electrons, which bump into each other to transfer the heat. Liquids and gases are poor conductors as they do not have freely moving particles to transfer kinetic energy like metals do.
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This document provides information about three main modes of heat transfer: radiation, conduction, and convection. Radiation involves the transfer of thermal energy through electromagnetic waves without touching objects, such as heat from the sun. Conduction requires direct contact as heat transfers from faster moving molecules to slower ones. Convection involves the movement of gases or liquids as warmer parts rise and cooler parts sink, transferring heat through examples like boiling water. The document also includes examples and a quiz to test understanding of the different heat transfer methods.
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This document discusses polymers, non-metallic materials, and heat treatment processes. It defines non-metallic materials as substances that do not conduct heat or electricity and are structurally brittle. Polymers are formed from long chains of repeating units and include plastics, rubbers, and fibers. Thermoplastics soften when heated and harden when cooled, while thermosets experience chemical changes when heated. Elastomers are elastic polymers like rubber. Ceramics are compounds with high melting temperatures and stiffness. Cements harden when mixed with water. Glasses are amorphous ceramics used in windows and containers. Refractories withstand high heat. Composites combine materials. Heat treating steel
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The document discusses heat and temperature. It explains that heat is a form of energy related to the motion of particles, while temperature depends on the average kinetic energy of particles. It describes common thermometers like mercury, alcohol, and bimetallic strip thermometers, which measure temperature changes by relying on the uniform expansion and contraction of gases, liquids and solids. Finally, it compares the Fahrenheit and Celsius temperature scales used to measure and report temperature.
Heat transfer
Heat can be transferred through direct contact, conduction, convection, and radiation. Through direct contact, heat transfers between two touching objects until they reach the same temperature. Conduction involves the transfer of heat through solids or liquids by the vibration of their particles. Convection transfers heat through the movement of fluids like gases and liquids. Radiation transfers heat through electromagnetic waves emitted by hot objects.
Haba
Heat is a form of energy that can flow from hot areas to cold areas. It can be transferred through radiation, conduction, or convection. Radiation transfers heat through electromagnetic waves and does not require a medium, while conduction requires physical contact between objects for heat transfer and convection involves the transfer of heat by a circulating fluid (liquid or gas). Good emitters of heat radiation are dull black surfaces, while good absorbers are also dull black surfaces. Shiny white or metallic surfaces are poor emitters and absorbers of heat radiation.
heat flow jigsaw.docx
This document provides information and instructions for students to research different types of heat transfer as experts in small groups. It includes expert cards on conduction, convection, and radiation. Students will research their assigned type of heat transfer, then present their findings to their home group. They are instructed to plan scientific investigations on related topics, such as which materials conduct heat best/worst, provide best insulation, or absorb and reflect radiation differently. The goal is for students to learn about the different types of heat transfer and be able to teach others.
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The document discusses various atmospheric phenomena such as air temperature, pressure, and heating. It explains how thermometers are used to measure air temperature and how air is heated by the sun, conduction, and convection. It also discusses specific heat and how cement gets hotter than soil. Additionally, it summarizes sea and land breezes caused by uneven heating of land and sea. Other topics covered include monsoons, trade winds, the Intertropical Convergence Zone (ITCZ), ozone formation and depletion, and the greenhouse effect.
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Transfer of heat occurs when heat flows from a hotter object to a colder object. Conduction is the transfer of heat through direct contact between objects without the movement of material. In conduction, heat transfers from the hotter end of an object like a metal spoon to the colder end. Good conductors like metals are used for cooking utensils because they conduct heat quickly, while poor conductors like fur and wool are used as insulation to prevent unwanted heat transfer.
Transmission of heat. Conduction, Convection, Radiation, Applications, Workin...
Heat is the thermal energy that flows from an object at higher temperature to an object at lower temperature.
The transfer of heat energy from one object to the other is called transmission of heat. Heat energy transfers in three ways,
1. Conduction
2. Convection
3. Radiation
Conduction
If one end of a metal rod is heated with a flame,
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The transfer of heat through matter without the actual movement of particles from their position is called conduction.
Conduction occurs in solids, liquids and gases, but solids usually conduct heat better than liquids or gases.
In solids, the particles are held very close to each other. They vibrate constantly. When we heat one part of a solid, the particles gain heat energy and start vibrating faster. During their vibration they collide nearby particles and also cause them to vibrate fast. In this way, the particles of hot part of a solid transfer heat to those in the colder parts.
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Different materials conduct heat at different rates. Materials which allow heat to flow through them easily are called good conductors of heat. Solids such as metals are good conductors of heat.
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Why metals are better conductors than non-metals?
All solids (metals and non-metals) are made of tiny particles called molecules. But, some solids conduct heat better than others. Put a metal and a plastic spoon in hot water. Which one is a good conductor of heat, metal or plastic? When both spoons receive heat energy, the particles (atoms or molecules) at the hot end of each spoon vibrate fast and collide into neighbouring particles. These particles transfer heat energy to next neighboring particles.
Particles in metals are packed more closely together than non-metals. Metals can transmit heat energy more readily than non-metals (wood, plastic, etc.). The presence of free electrons also speeds up the transfer of heat in metals. When the metal spoon gets heated, the free electrons gain kinetic energy and move farther towards the colder parts of the metal spoon. They collide the atoms in the colder parts and transfer heat energy to them. In metals, heat energy is transferred from one place to another both by the vibrations of particles as well as by the movement of free electrons. That is why metals are good conductors of heat than non-metals(insulators).
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This document provides information about three main modes of heat transfer: radiation, conduction, and convection. Radiation involves the transfer of thermal energy through electromagnetic waves without touching objects, such as heat from the sun. Conduction requires direct contact as heat transfers from faster moving molecules to slower ones. Convection involves the movement of gases or liquids as warmer parts rise and cooler parts sink, transferring heat through examples like boiling water. The document also includes examples and a quiz to test understanding of the different heat transfer methods.
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The document discusses heat and temperature. It explains that heat is a form of energy related to the motion of particles, while temperature depends on the average kinetic energy of particles. It describes common thermometers like mercury, alcohol, and bimetallic strip thermometers, which measure temperature changes by relying on the uniform expansion and contraction of gases, liquids and solids. Finally, it compares the Fahrenheit and Celsius temperature scales used to measure and report temperature.
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Heat can be transferred through direct contact, conduction, convection, and radiation. Through direct contact, heat transfers between two touching objects until they reach the same temperature. Conduction involves the transfer of heat through solids or liquids by the vibration of their particles. Convection transfers heat through the movement of fluids like gases and liquids. Radiation transfers heat through electromagnetic waves emitted by hot objects.
Haba
Heat is a form of energy that can flow from hot areas to cold areas. It can be transferred through radiation, conduction, or convection. Radiation transfers heat through electromagnetic waves and does not require a medium, while conduction requires physical contact between objects for heat transfer and convection involves the transfer of heat by a circulating fluid (liquid or gas). Good emitters of heat radiation are dull black surfaces, while good absorbers are also dull black surfaces. Shiny white or metallic surfaces are poor emitters and absorbers of heat radiation.
heat flow jigsaw.docx
This document provides information and instructions for students to research different types of heat transfer as experts in small groups. It includes expert cards on conduction, convection, and radiation. Students will research their assigned type of heat transfer, then present their findings to their home group. They are instructed to plan scientific investigations on related topics, such as which materials conduct heat best/worst, provide best insulation, or absorb and reflect radiation differently. The goal is for students to learn about the different types of heat transfer and be able to teach others.
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The document discusses the Responsible Parenthood and Reproductive Health Act of 2012 in the Philippines, which guarantees universal access to contraception, fertility control, sex education, and maternal care. It mandates the government to promote all effective and legal family planning methods. The bill also requires reproductive health education in schools and guarantees reproductive healthcare for female employees. It aims to promote responsible parenthood through a multi-dimensional approach integrated into anti-poverty programs.
The atmosphere
The document discusses the layers of Earth's atmosphere. It is divided into five main layers from lowest to highest:
1) The troposphere, extending up to 9-16 km, contains weather patterns and decreases in temperature with altitude.
2) The stratosphere, up to 50 km high, contains the ozone layer and has a temperature that initially increases with altitude.
3) The mesosphere, up to 85 km high, has a sudden temperature increase then decrease with altitude and contains ionized layers.
4) The thermosphere, 80-640 km high, has extremely high temperatures over 1000°C and contains the ionosphere responsible for reflecting radio waves.
5) The exosphere, over
Gravity
The document discusses the force of gravity and its effects. It explains that gravity is a downward pulling force that attracts all objects on Earth toward its center. It causes things thrown up to fall back down, and makes downward movement faster than upward movement. Gravity is responsible for many phenomena we observe, such as leaves falling from trees, objects slipping from our hands, and kites falling when the wind stops blowing. It establishes our weight and keeps us and everything on Earth from floating off into space.
Maternal health concerns
This document discusses maternal health concerns before, during, and after pregnancy. Before pregnancy, women should see their doctor to discuss any existing health problems and how treatment may need to be adjusted. During pregnancy, women may experience a range of symptoms from mild discomforts to severe illnesses. Common health conditions experienced during pregnancy include anemia, UTIs, gestational diabetes, and hypertension. After pregnancy, women can experience postpartum depression caused by hormonal changes after childbirth. Proper prenatal and postnatal care is important for both mother and baby's health.
Energy
Most activities involve energy in different forms. Sound, light, heat, and chemical/mechanical energies are used from waking up until moving around. Forces like gravity, wind, water, electricity, and magnetism can push or pull objects to cause motion. Motion is the change in position of an object due to force. Forces can make objects move, change their speed and direction of movement, stretch or compress, or cause up and down motion through balanced or unbalanced opposing forces.
Friction
Forces can cause objects at rest to move or change an object's motion. There are two main types of forces - contact forces that require touching and non-contact forces like gravity. Friction is a contact force that resists the movement of objects in contact with each other. The document discusses the different types of friction like static, sliding, and rolling friction and how friction affects motion. It also describes ways to reduce friction using lubricants and wheels and ways to increase friction using rough surfaces. Safety measures around friction to prevent accidents are mentioned.
Dating, courtship, and marriage
This document discusses the topics of dating, courtship, and marriage. It defines infatuation and love, and notes that dating is a form of courtship where couples engage in social activities together. There are different types of dates like standard, double, and group dates. Dating is important as it allows couples to develop affection, strengthen their relationship, get to know each other's character, and have fun. Courtship precedes engagement and allows couples time to understand one another. Engagement is a period where couples ensure they are ready for lifelong companionship before marrying, which is a permanent union between a man and woman. Factors like maturity, commitment, and character are important to consider when choosing a lifetime partner for a
Periodic table
The document summarizes the key people involved in the discovery and development of the periodic table of elements. It discusses Johann Dobereiner who discovered triads of elements, de Chancourtois who arranged elements in a helix, Newlands who proposed periodicity based on atomic mass, and Mendeleev who created one of the first recognizable periodic tables. It also mentions the contributions of Meyer, Ramsay, Moseley, and Seaborg in refining the table and adding new elements. The periodic table organizes elements based on electron configuration in their outermost shells and exhibits trends in properties from atomic radius to metallic character across the table.
Kinematic equations
The document discusses kinematic equations that describe uniformly accelerated motion. It provides the equations for final velocity, displacement, and initial and final velocities as functions of acceleration, time, and initial velocity or displacement. Examples are included to demonstrate solving for final velocity and displacement given values for acceleration, time, and initial velocity. The kinematic equations can be used to analyze motion under constant acceleration.
Velocity
Velocity is defined as the rate of change of an object's position over time, taking into account both speed and direction, and can be calculated using the formula that average velocity equals displacement over time. The document provides examples of calculating average velocity and discusses how velocity differs from speed by incorporating direction. It also defines acceleration as the change in velocity over a time interval and provides examples of calculating acceleration from changes in speed or direction over time.
Teenage concerns
This document discusses several key issues regarding teenage sexual health. It notes that adolescence is a formative time when habits are learned. Some of the most important issues are physical body changes during puberty, increased interest in sex due to hormones, and the need for comprehensive sex education about risks and consequences. Teenagers are exposed to sexual topics from many sources and need guidance on their values. The document outlines additional challenges such as dating pressure, risks of teenage pregnancy, importance of abstinence or safe sex education, and sexually transmitted diseases.
Sound energy
Sound is energy produced by vibrations traveling through matter such as air. Vibrations cause the surrounding air to produce sound waves that transmit the sound outward from its source. When these waves reach the ears, the brain processes the messages as sound. Sound travels faster through solids than liquids or gases due to the density of the medium. It also travels much slower than light, explaining why thunder is heard after lightning is seen. Protection from loud noises that can damage hearing includes avoiding very close or prolonged exposure to sounds and wearing ear protection during noisy activities.
Velocity
Velocity is defined as the rate of change of an object's position with respect to time and includes both magnitude (speed) and direction. It can be calculated using the formula: Average velocity = Displacement / Time. In the example, a girl travels 8 km in 15 minutes (0.25 hours) to get to school, so her average velocity is 32 km/h. Acceleration is the change in velocity over a time interval and is calculated as: Acceleration = Change in Velocity / Time Interval. It is a measure of how quickly an object's velocity changes. Both speed and direction must change for an object to be accelerating.
Mangrove swamps
Mangroves are woody plants that grow in coastal saline waters and muddy soils between land and sea in tropical and subtropical regions. They have complex root systems adapted for survival in wet, oxygen-poor conditions. Mangrove swamps support rich biodiversity and provide important ecosystem services like coastal protection, sediment stabilization, and nursery habitats for marine life. However, mangroves are threatened by habitat loss from aquaculture, development, pollution, and overharvesting of resources. Conservation efforts aim to protect remaining mangrove areas and restore degraded ecosystems.
Electron configuration
This document discusses the electron distribution in orbitals and sublevels across the first four principal energy levels. It provides the number of orbitals and electrons in each sublevel (s, p, d, f) as well as the total electrons per principal energy level. The first level contains 2 electrons in the s orbital. Each subsequent level adds new sublevels with increasing numbers of orbitals and electrons as you move further from the atomic nucleus.
Light energy
Light energy comes from natural sources like the sun and stars, or artificial sources created by humans like light bulbs and flashlights. Light travels in a straight line and can be blocked by opaque objects to form shadows, or pass through transparent materials. When light interacts with surfaces and objects, it exhibits behaviors like reflection off shiny surfaces, refraction as it passes through different materials, and causing damage when overexposed, such as sunburn from ultraviolet rays.
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Heat transfer
- 1. HEAT TRANSFER - convey energy from one location to another.
- 2. Have you already eaten dirty ice cream? Where can you buy them? What keeps the ice/ice cream from melting in an ice cream cart? What does heat have to do with something cold like sorbetes?
- 3. Material that makes up a substance determines the way it will interact with thermal energy. There are materials that allow thermal energy to easily pass through them, and there are also other materials do not heat up easily.
- 4. TYPES OF MATERIALS (based on the ability of heat to pass through them)
- 5. Conductors - material that transfers thermal energy faster. - Most SOLIDS are better conductors than liquids and gases (arrangement of particles) - Most METALS are excellent conductors of heat, other solids like wood conduct heat at much slower rate than metals (contain pockets of air trapped between particles). - Metals are often used as materials for pots and pans. Metals such aluminum, iron, and tin are best examples of metals usually used in making those utensils. - It plays important role in cookware. - Ex: cooking food – the heat transfer from the stove to the food, thus allowing it to cook - Ex: industries involve melting and molding of metals
- 7. Insulators - materials that does not transfer thermal energy fast and is therefore a poor conductor of heat. - Insulators have few particles that can collide and transfer energy or have particles that do not move around well. - In order for the thermal energy to transfer, the material should have particles that collides with each other thus allowing the heat to transfer or move. Molecules that are far from energy allowing the heat to transfer slowly. - Ex: They work well to prevent your hands from getting burned while you handle hot objects, handles of pots and pans, thick blanket and heavy coat (preventing the thermal energy from the body from escaping), and houses in cold places are built with fiberglass insulation system (composed of pockets of nonmoving air that traps heat).