The correct answer is option B: More. Silver has a higher thermal conductivity than copper. Thermal conductivity refers to a material's ability to conduct heat. Silver, with a thermal conductivity of approximately 429 watts per meter Kelvin (W/mK), surpasses copper's thermal conductivity of about 40Read more
The correct answer is option B: More. Silver has a higher thermal conductivity than copper. Thermal conductivity refers to a material’s ability to conduct heat. Silver, with a thermal conductivity of approximately 429 watts per meter Kelvin (W/mK), surpasses copper’s thermal conductivity of about 401 W/mK. This characteristic makes silver an excellent conductor of heat, often utilized in applications where efficient heat transfer is crucial, such as in electronics and thermal interface materials. Copper is also a good conductor but slightly less efficient than silver. Therefore, the correct answer is option B: more. Silver’s superior thermal conductivity makes it a preferred choice in various industries where heat management is essential for optimal performance and efficiency.
The correct answer is [B] Mercury. The best conductor of heat among the options provided is mercury. Mercury is a metal with high thermal conductivity, meaning it can efficiently transfer heat. In contrast, water, wood, and leather are poor conductors of heat. Water has a relatively low thermal condRead more
The correct answer is [B] Mercury. The best conductor of heat among the options provided is mercury. Mercury is a metal with high thermal conductivity, meaning it can efficiently transfer heat. In contrast, water, wood, and leather are poor conductors of heat. Water has a relatively low thermal conductivity due to its molecular structure, while wood and leather are insulators and do not conduct heat well. Mercury, being a metal, has free-moving electrons that can easily transfer thermal energy throughout its structure, making it an excellent conductor of heat.
The correct answer is [A] Conduction. The method of heat transmission in which the particles of the medium do not move is conduction. Conduction involves the transfer of heat through direct contact between particles in a material medium. When one part of a solid object is heated, thermal energy is tRead more
The correct answer is [A] Conduction. The method of heat transmission in which the particles of the medium do not move is conduction. Conduction involves the transfer of heat through direct contact between particles in a material medium. When one part of a solid object is heated, thermal energy is transferred from the hotter region to the cooler region through collisions between adjacent particles. However, the particles themselves do not undergo significant movement from their positions; rather, it is the energy that is transferred through the material. In contrast, convection involves the movement of fluid particles carrying heat energy, while radiation involves the transfer of heat through electromagnetic waves.
The correct answer is [C] Radiation. In the method of heat transfer known as radiation, a medium is not necessary. Radiation involves the transfer of heat energy through electromagnetic waves, such as light and infrared radiation. Unlike conduction and convection, which require a material medium, raRead more
The correct answer is [C] Radiation. In the method of heat transfer known as radiation, a medium is not necessary. Radiation involves the transfer of heat energy through electromagnetic waves, such as light and infrared radiation. Unlike conduction and convection, which require a material medium, radiation can occur even in a vacuum, such as outer space. This is because electromagnetic waves can propagate through empty space without the need for any material substance to carry them. Therefore, radiation is the only method of heat transfer where a medium is not required for the transmission of heat energy. Conduction involves the transfer of heat through direct contact between particles in a material medium, while convection involves the transfer of heat through the movement of fluid particles within a medium. However, radiation can occur independently of any material medium, making it unique among the three methods.
The correct answer is [B] Radiation. The Sun's heat reaches the Earth primarily through radiation. Radiation is the transfer of heat energy through electromagnetic waves, such as light and infrared radiation, that travel through the vacuum of space. These electromagnetic waves carry energy from theRead more
The correct answer is [B] Radiation. The Sun’s heat reaches the Earth primarily through radiation. Radiation is the transfer of heat energy through electromagnetic waves, such as light and infrared radiation, that travel through the vacuum of space. These electromagnetic waves carry energy from the Sun and warm the Earth’s surface when they are absorbed. Unlike convection, which involves the transfer of heat through the movement of fluids, and condensation, which is a phase change process, radiation does not require a medium to propagate. Heat exchange is a broad term that can encompass various methods of transferring heat, including conduction, convection, and radiation, but it is not specific to the transmission of heat from the Sun to the Earth.
The correct answer is [A] Due to conduction. Water in an electric kettle gets heated primarily due to conduction. When the heating element of the kettle comes into direct contact with the water, thermal energy is transferred through the metal of the element to the water molecules, causing them to viRead more
The correct answer is [A] Due to conduction. Water in an electric kettle gets heated primarily due to conduction. When the heating element of the kettle comes into direct contact with the water, thermal energy is transferred through the metal of the element to the water molecules, causing them to vibrate and increase in temperature. This process is a classic example of conduction, where heat is transmitted through direct contact between particles. While convection may play a minor role as the heated water rises and cooler water sinks, and radiation may contribute slightly to the overall heating process, the main mechanism responsible for heating the water in an electric kettle is conduction.
Heat is primarily transferred in liquids and gases by the method of convection. Convection involves the actual movement of fluid particles, carrying heat with them as they circulate. When a fluid is heated, its particles become less dense and rise, while cooler, denser particles sink. This creates aRead more
Heat is primarily transferred in liquids and gases by the method of convection. Convection involves the actual movement of fluid particles, carrying heat with them as they circulate. When a fluid is heated, its particles become less dense and rise, while cooler, denser particles sink. This creates a continuous circulation of the fluid, transferring heat throughout. While conduction can also occur within fluids, it is less efficient compared to convection due to the fluid’s ability to flow. Radiation can also transfer heat in liquids and gases, but it does so primarily in the form of infrared radiation, which is less significant compared to convection. Therefore, while all three methods—conduction, convection, and radiation—can transfer heat in liquids and gases to some extent, convection is the dominant mechanism in this context. The correct answer is [B] Convection.
In the method of transmission of heat known as conduction, particles of matter do not move on their own from one place to another. Conduction involves the transfer of heat through direct contact between particles in a material. When one part of a solid object is heated, the particles in that regionRead more
In the method of transmission of heat known as conduction, particles of matter do not move on their own from one place to another. Conduction involves the transfer of heat through direct contact between particles in a material. When one part of a solid object is heated, the particles in that region vibrate more vigorously. These vibrations are passed along to neighboring particles, transferring energy from the hotter region to the cooler region. However, the particles themselves do not move significantly from their positions; rather, it is the energy that is transmitted through the material.
In contrast, convection involves the actual movement of fluid particles (liquids or gases) from one place to another, carrying heat with them. Radiation does not require any medium and involves the transfer of heat through electromagnetic waves.
Therefore, the correct answer is [A] Conduction, as it is the method where particles do not move on their own from one place to another.
The method of transmission of heat includes conduction, convection, and radiation, covering all the given options. Conduction is the transfer of heat through direct contact between molecules, typically occurring in solids. An example is a metal rod heating up when one end is placed in a flame. ConveRead more
The method of transmission of heat includes conduction, convection, and radiation, covering all the given options. Conduction is the transfer of heat through direct contact between molecules, typically occurring in solids. An example is a metal rod heating up when one end is placed in a flame. Convection is the transfer of heat through the movement of fluids, such as liquids and gases. This process can be observed when warm air rises and cool air descends, creating convection currents. Radiation is the transfer of heat through electromagnetic waves, which can occur even through a vacuum. The heat we feel from the sun is due to radiation. Each of these methods operates under different principles and in different mediums, but together, they encompass all the ways heat can be transmitted. Therefore, the correct answer is [D] All of the above.
When water freezes due to cold in winter, fishes and other aquatic organisms can survive because only the upper layer of water freezes. This phenomenon occurs because ice is less dense than liquid water, causing it to float on the surface. The layer of ice acts as an insulating barrier, maintainingRead more
When water freezes due to cold in winter, fishes and other aquatic organisms can survive because only the upper layer of water freezes. This phenomenon occurs because ice is less dense than liquid water, causing it to float on the surface. The layer of ice acts as an insulating barrier, maintaining a relatively stable and warmer temperature in the water below, typically around 4°C. This insulated environment allows fish and other aquatic organisms to survive the winter. Additionally, many aquatic species have adapted to cold conditions, slowing their metabolism and becoming less active to conserve energy. This adaptation helps them survive in the lower, unfrozen layers of the lake. Therefore, the correct answer is [A] survive, because only the upper layer of water freezes.
The thermal conductivity of silver is greater than the thermal conductivity of copper
The correct answer is option B: More. Silver has a higher thermal conductivity than copper. Thermal conductivity refers to a material's ability to conduct heat. Silver, with a thermal conductivity of approximately 429 watts per meter Kelvin (W/mK), surpasses copper's thermal conductivity of about 40Read more
The correct answer is option B: More. Silver has a higher thermal conductivity than copper. Thermal conductivity refers to a material’s ability to conduct heat. Silver, with a thermal conductivity of approximately 429 watts per meter Kelvin (W/mK), surpasses copper’s thermal conductivity of about 401 W/mK. This characteristic makes silver an excellent conductor of heat, often utilized in applications where efficient heat transfer is crucial, such as in electronics and thermal interface materials. Copper is also a good conductor but slightly less efficient than silver. Therefore, the correct answer is option B: more. Silver’s superior thermal conductivity makes it a preferred choice in various industries where heat management is essential for optimal performance and efficiency.
See lessWhich of the following is the best conductor of heat?
The correct answer is [B] Mercury. The best conductor of heat among the options provided is mercury. Mercury is a metal with high thermal conductivity, meaning it can efficiently transfer heat. In contrast, water, wood, and leather are poor conductors of heat. Water has a relatively low thermal condRead more
The correct answer is [B] Mercury. The best conductor of heat among the options provided is mercury. Mercury is a metal with high thermal conductivity, meaning it can efficiently transfer heat. In contrast, water, wood, and leather are poor conductors of heat. Water has a relatively low thermal conductivity due to its molecular structure, while wood and leather are insulators and do not conduct heat well. Mercury, being a metal, has free-moving electrons that can easily transfer thermal energy throughout its structure, making it an excellent conductor of heat.
See lessWhich is the method of heat transmission in which the particles of the medium do not move?
The correct answer is [A] Conduction. The method of heat transmission in which the particles of the medium do not move is conduction. Conduction involves the transfer of heat through direct contact between particles in a material medium. When one part of a solid object is heated, thermal energy is tRead more
The correct answer is [A] Conduction. The method of heat transmission in which the particles of the medium do not move is conduction. Conduction involves the transfer of heat through direct contact between particles in a material medium. When one part of a solid object is heated, thermal energy is transferred from the hotter region to the cooler region through collisions between adjacent particles. However, the particles themselves do not undergo significant movement from their positions; rather, it is the energy that is transferred through the material. In contrast, convection involves the movement of fluid particles carrying heat energy, while radiation involves the transfer of heat through electromagnetic waves.
See lessIn which method of heat transfer, medium is not necessary?
The correct answer is [C] Radiation. In the method of heat transfer known as radiation, a medium is not necessary. Radiation involves the transfer of heat energy through electromagnetic waves, such as light and infrared radiation. Unlike conduction and convection, which require a material medium, raRead more
The correct answer is [C] Radiation. In the method of heat transfer known as radiation, a medium is not necessary. Radiation involves the transfer of heat energy through electromagnetic waves, such as light and infrared radiation. Unlike conduction and convection, which require a material medium, radiation can occur even in a vacuum, such as outer space. This is because electromagnetic waves can propagate through empty space without the need for any material substance to carry them. Therefore, radiation is the only method of heat transfer where a medium is not required for the transmission of heat energy. Conduction involves the transfer of heat through direct contact between particles in a material medium, while convection involves the transfer of heat through the movement of fluid particles within a medium. However, radiation can occur independently of any material medium, making it unique among the three methods.
See lessSun’s heat comes to the Earth through which of the following types of communication medium?
The correct answer is [B] Radiation. The Sun's heat reaches the Earth primarily through radiation. Radiation is the transfer of heat energy through electromagnetic waves, such as light and infrared radiation, that travel through the vacuum of space. These electromagnetic waves carry energy from theRead more
The correct answer is [B] Radiation. The Sun’s heat reaches the Earth primarily through radiation. Radiation is the transfer of heat energy through electromagnetic waves, such as light and infrared radiation, that travel through the vacuum of space. These electromagnetic waves carry energy from the Sun and warm the Earth’s surface when they are absorbed. Unlike convection, which involves the transfer of heat through the movement of fluids, and condensation, which is a phase change process, radiation does not require a medium to propagate. Heat exchange is a broad term that can encompass various methods of transferring heat, including conduction, convection, and radiation, but it is not specific to the transmission of heat from the Sun to the Earth.
See lessWater in an electric kettle gets heated due to
The correct answer is [A] Due to conduction. Water in an electric kettle gets heated primarily due to conduction. When the heating element of the kettle comes into direct contact with the water, thermal energy is transferred through the metal of the element to the water molecules, causing them to viRead more
The correct answer is [A] Due to conduction. Water in an electric kettle gets heated primarily due to conduction. When the heating element of the kettle comes into direct contact with the water, thermal energy is transferred through the metal of the element to the water molecules, causing them to vibrate and increase in temperature. This process is a classic example of conduction, where heat is transmitted through direct contact between particles. While convection may play a minor role as the heated water rises and cooler water sinks, and radiation may contribute slightly to the overall heating process, the main mechanism responsible for heating the water in an electric kettle is conduction.
See lessHeat is transferred in liquids and gases by which of the following methods?
Heat is primarily transferred in liquids and gases by the method of convection. Convection involves the actual movement of fluid particles, carrying heat with them as they circulate. When a fluid is heated, its particles become less dense and rise, while cooler, denser particles sink. This creates aRead more
Heat is primarily transferred in liquids and gases by the method of convection. Convection involves the actual movement of fluid particles, carrying heat with them as they circulate. When a fluid is heated, its particles become less dense and rise, while cooler, denser particles sink. This creates a continuous circulation of the fluid, transferring heat throughout. While conduction can also occur within fluids, it is less efficient compared to convection due to the fluid’s ability to flow. Radiation can also transfer heat in liquids and gases, but it does so primarily in the form of infrared radiation, which is less significant compared to convection. Therefore, while all three methods—conduction, convection, and radiation—can transfer heat in liquids and gases to some extent, convection is the dominant mechanism in this context. The correct answer is [B] Convection.
See lessIn which method of transmission of heat, particles of matter do not move on their own from one place to another?
In the method of transmission of heat known as conduction, particles of matter do not move on their own from one place to another. Conduction involves the transfer of heat through direct contact between particles in a material. When one part of a solid object is heated, the particles in that regionRead more
In the method of transmission of heat known as conduction, particles of matter do not move on their own from one place to another. Conduction involves the transfer of heat through direct contact between particles in a material. When one part of a solid object is heated, the particles in that region vibrate more vigorously. These vibrations are passed along to neighboring particles, transferring energy from the hotter region to the cooler region. However, the particles themselves do not move significantly from their positions; rather, it is the energy that is transmitted through the material.
In contrast, convection involves the actual movement of fluid particles (liquids or gases) from one place to another, carrying heat with them. Radiation does not require any medium and involves the transfer of heat through electromagnetic waves.
Therefore, the correct answer is [A] Conduction, as it is the method where particles do not move on their own from one place to another.
See lessThe method of transmission of heat is
The method of transmission of heat includes conduction, convection, and radiation, covering all the given options. Conduction is the transfer of heat through direct contact between molecules, typically occurring in solids. An example is a metal rod heating up when one end is placed in a flame. ConveRead more
The method of transmission of heat includes conduction, convection, and radiation, covering all the given options. Conduction is the transfer of heat through direct contact between molecules, typically occurring in solids. An example is a metal rod heating up when one end is placed in a flame. Convection is the transfer of heat through the movement of fluids, such as liquids and gases. This process can be observed when warm air rises and cool air descends, creating convection currents. Radiation is the transfer of heat through electromagnetic waves, which can occur even through a vacuum. The heat we feel from the sun is due to radiation. Each of these methods operates under different principles and in different mediums, but together, they encompass all the ways heat can be transmitted. Therefore, the correct answer is [D] All of the above.
See lessWhen water freezes due to cold in winter, fishes and other aquatic organisms can
When water freezes due to cold in winter, fishes and other aquatic organisms can survive because only the upper layer of water freezes. This phenomenon occurs because ice is less dense than liquid water, causing it to float on the surface. The layer of ice acts as an insulating barrier, maintainingRead more
When water freezes due to cold in winter, fishes and other aquatic organisms can survive because only the upper layer of water freezes. This phenomenon occurs because ice is less dense than liquid water, causing it to float on the surface. The layer of ice acts as an insulating barrier, maintaining a relatively stable and warmer temperature in the water below, typically around 4°C. This insulated environment allows fish and other aquatic organisms to survive the winter. Additionally, many aquatic species have adapted to cold conditions, slowing their metabolism and becoming less active to conserve energy. This adaptation helps them survive in the lower, unfrozen layers of the lake. Therefore, the correct answer is [A] survive, because only the upper layer of water freezes.
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