Gas thermometers are more sensitive than liquid thermometers because gases; option [B] have higher coefficient of expansion. The coefficient of expansion determines how much a substance expands or contracts with a change in temperature. Gases typically have higher coefficients of expansion comparedRead more
Gas thermometers are more sensitive than liquid thermometers because gases; option [B] have higher coefficient of expansion. The coefficient of expansion determines how much a substance expands or contracts with a change in temperature. Gases typically have higher coefficients of expansion compared to liquids, meaning they expand more for the same temperature change. This increased expansion results in larger changes in volume, which can be detected more easily, making gas thermometers more sensitive. Additionally, gases have the advantage of being compressible, allowing them to expand or contract more freely in response to temperature variations. This property enhances their sensitivity further. Liquid thermometers, while useful in many applications, often exhibit less sensitivity because liquids generally have lower coefficients of expansion than gases. Moreover, gases tend to have simpler and more predictable behavior over a wider range of temperatures compared to liquids, contributing to the higher sensitivity of gas thermometers. These characteristics make gas thermometers valuable tools in scientific research, industrial processes, and everyday temperature measurements.
By increasing the pressure on ice, its melting point will; option [B] increase. Pressure influences the equilibrium between solid and liquid phases. When pressure rises, the equilibrium shifts towards the more densely packed solid phase. To maintain equilibrium, a higher temperature is required forRead more
By increasing the pressure on ice, its melting point will; option [B] increase. Pressure influences the equilibrium between solid and liquid phases. When pressure rises, the equilibrium shifts towards the more densely packed solid phase. To maintain equilibrium, a higher temperature is required for the solid to melt into liquid, resulting in an increased melting point. This phenomenon is described by the Clausius-Clapeyron equation, which states that the melting point of a substance increases with increasing pressure. This relationship holds true for most substances, including ice. Therefore, as pressure on ice increases, its melting point increases accordingly. This principle has significant implications, especially in geology and glaciology, where understanding the effect of pressure on melting points helps explain phenomena like the behavior of glaciers under varying pressure conditions. It also has practical applications in industries such as food preservation and materials science, where precise control over melting points is necessary for manufacturing processes and product quality.
Camels are well-adapted to survive in hot desert environments with temperatures reaching up to 48°C (120°F) . When the temperature is high, camels feel relief from the heat by increasing their body temperature to 42°C [B]. This allows them to conserve water by reducing the need to sweat and lose preRead more
Camels are well-adapted to survive in hot desert environments with temperatures reaching up to 48°C (120°F) . When the temperature is high, camels feel relief from the heat by increasing their body temperature to 42°C [B]. This allows them to conserve water by reducing the need to sweat and lose precious bodily fluids.
Camels have several other adaptations that help them thrive in the desert heat:
– They have thick fur that insulates them from the sun’s rays during the day and retains heat at night.
– Their humps are made of fat that can be broken down into water and energy when needed.
– They can go for long periods without drinking water by recycling water and salts in their bodies.
So, in summary, the correct answer is; option [B] – camels increase their body temperature to 42°C to reduce water loss through sweating and stay cool in the desert heat.
The reason for the temperature of water at the bottom of the waterfall being higher is; option [C] The kinetic energy of falling water is converted into heat. As water descends in the waterfall, its potential energy is converted into kinetic energy. Upon impact at the bottom, this kinetic energy disRead more
The reason for the temperature of water at the bottom of the waterfall being higher is; option [C] The kinetic energy of falling water is converted into heat. As water descends in the waterfall, its potential energy is converted into kinetic energy. Upon impact at the bottom, this kinetic energy dissipates into the surroundings as heat due to friction with the air and rocks, increasing the water’s temperature. This process is consistent with the law of conservation of energy, where energy changes form but is not created or destroyed. While option [A] implies potential energy differences, it does not directly explain the temperature variation. Options [B] and [D] are not relevant as they do not address the conversion of energy from kinetic to thermal form, which is the primary mechanism responsible for the temperature difference.
The SI unit of temperature is; option [A] Kelvin. Kelvin is the base unit for temperature measurement in the International System of Units (SI). Celsius (option [B]), Centigrade (option [C]), and Fahrenheit (option [D]) are alternative temperature scales. However, Kelvin is the preferred unit in sciRead more
The SI unit of temperature is; option [A] Kelvin. Kelvin is the base unit for temperature measurement in the International System of Units (SI). Celsius (option [B]), Centigrade (option [C]), and Fahrenheit (option [D]) are alternative temperature scales. However, Kelvin is the preferred unit in scientific contexts and is defined based on absolute zero, making it the standard unit for thermodynamic temperature measurements. Celsius and Centigrade scales share the same unit size, while Fahrenheit is a different scale commonly used in the United States. Understanding the distinction between these temperature scales is essential in various scientific fields, particularly in thermodynamics, physics, and engineering, where precise temperature measurements are crucial for accurate calculations and experiments.
Among the options provided; option [D] Degree Celsius is not a unit of heat. Instead, it is a unit of temperature measurement on the Celsius scale. Calorie (option [A]), Kilocalorie (option [B]), and Joule (option [C]) are all units used to quantify heat or energy. They represent different scales foRead more
Among the options provided; option [D] Degree Celsius is not a unit of heat. Instead, it is a unit of temperature measurement on the Celsius scale. Calorie (option [A]), Kilocalorie (option [B]), and Joule (option [C]) are all units used to quantify heat or energy. They represent different scales for measuring the amount of heat or energy transferred. Calorie and Kilocalorie are commonly used in the context of food and nutrition to measure the energy content of food, while Joule is the SI unit of energy and is commonly used in scientific and engineering applications to measure heat, work, and energy transfer. Understanding the distinction between temperature and heat is crucial in various fields, including thermodynamics, physics, and engineering.
The correct answer is option B: Thermal radiation. A bolometer is an instrument used to measure thermal radiation. It detects and quantifies the intensity of infrared or heat radiation emitted by objects. When exposed to thermal radiation, a bolometer undergoes a change in electrical resistance, whiRead more
The correct answer is option B: Thermal radiation. A bolometer is an instrument used to measure thermal radiation. It detects and quantifies the intensity of infrared or heat radiation emitted by objects. When exposed to thermal radiation, a bolometer undergoes a change in electrical resistance, which is then measured to determine the intensity of the radiation. This principle allows bolometers to be used in various applications, including astronomy for studying celestial objects emitting infrared radiation, in thermal imaging devices for detecting heat signatures, and in industrial processes for monitoring temperature and thermal properties. Unlike instruments that measure thermal conductivity, intensity of sound, or specific heat, a bolometer specifically targets thermal radiation, making it a valuable tool in fields where precise measurement of heat energy is necessary for research, monitoring, and analysis.
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.
Gas thermometers are more sensitive than liquid thermometers because gases
Gas thermometers are more sensitive than liquid thermometers because gases; option [B] have higher coefficient of expansion. The coefficient of expansion determines how much a substance expands or contracts with a change in temperature. Gases typically have higher coefficients of expansion comparedRead more
Gas thermometers are more sensitive than liquid thermometers because gases; option [B] have higher coefficient of expansion. The coefficient of expansion determines how much a substance expands or contracts with a change in temperature. Gases typically have higher coefficients of expansion compared to liquids, meaning they expand more for the same temperature change. This increased expansion results in larger changes in volume, which can be detected more easily, making gas thermometers more sensitive. Additionally, gases have the advantage of being compressible, allowing them to expand or contract more freely in response to temperature variations. This property enhances their sensitivity further. Liquid thermometers, while useful in many applications, often exhibit less sensitivity because liquids generally have lower coefficients of expansion than gases. Moreover, gases tend to have simpler and more predictable behavior over a wider range of temperatures compared to liquids, contributing to the higher sensitivity of gas thermometers. These characteristics make gas thermometers valuable tools in scientific research, industrial processes, and everyday temperature measurements.
See lessBy increasing the pressure on ice, its melting point
By increasing the pressure on ice, its melting point will; option [B] increase. Pressure influences the equilibrium between solid and liquid phases. When pressure rises, the equilibrium shifts towards the more densely packed solid phase. To maintain equilibrium, a higher temperature is required forRead more
By increasing the pressure on ice, its melting point will; option [B] increase. Pressure influences the equilibrium between solid and liquid phases. When pressure rises, the equilibrium shifts towards the more densely packed solid phase. To maintain equilibrium, a higher temperature is required for the solid to melt into liquid, resulting in an increased melting point. This phenomenon is described by the Clausius-Clapeyron equation, which states that the melting point of a substance increases with increasing pressure. This relationship holds true for most substances, including ice. Therefore, as pressure on ice increases, its melting point increases accordingly. This principle has significant implications, especially in geology and glaciology, where understanding the effect of pressure on melting points helps explain phenomena like the behavior of glaciers under varying pressure conditions. It also has practical applications in industries such as food preservation and materials science, where precise control over melting points is necessary for manufacturing processes and product quality.
See lessEven when the temperature reaches 46 °C in summer, a camel feels relief from the heat by
Camels are well-adapted to survive in hot desert environments with temperatures reaching up to 48°C (120°F) . When the temperature is high, camels feel relief from the heat by increasing their body temperature to 42°C [B]. This allows them to conserve water by reducing the need to sweat and lose preRead more
Camels are well-adapted to survive in hot desert environments with temperatures reaching up to 48°C (120°F) . When the temperature is high, camels feel relief from the heat by increasing their body temperature to 42°C [B]. This allows them to conserve water by reducing the need to sweat and lose precious bodily fluids.
Camels have several other adaptations that help them thrive in the desert heat:
– They have thick fur that insulates them from the sun’s rays during the day and retains heat at night.
– Their humps are made of fat that can be broken down into water and energy when needed.
– They can go for long periods without drinking water by recycling water and salts in their bodies.
So, in summary, the correct answer is; option [B] – camels increase their body temperature to 42°C to reduce water loss through sweating and stay cool in the desert heat.
See lessThe temperature of water at the bottom of the waterfall is higher than that at the top. The reason for it being more is
The reason for the temperature of water at the bottom of the waterfall being higher is; option [C] The kinetic energy of falling water is converted into heat. As water descends in the waterfall, its potential energy is converted into kinetic energy. Upon impact at the bottom, this kinetic energy disRead more
The reason for the temperature of water at the bottom of the waterfall being higher is; option [C] The kinetic energy of falling water is converted into heat. As water descends in the waterfall, its potential energy is converted into kinetic energy. Upon impact at the bottom, this kinetic energy dissipates into the surroundings as heat due to friction with the air and rocks, increasing the water’s temperature. This process is consistent with the law of conservation of energy, where energy changes form but is not created or destroyed. While option [A] implies potential energy differences, it does not directly explain the temperature variation. Options [B] and [D] are not relevant as they do not address the conversion of energy from kinetic to thermal form, which is the primary mechanism responsible for the temperature difference.
See lessThe SI unit of temperature is
The SI unit of temperature is; option [A] Kelvin. Kelvin is the base unit for temperature measurement in the International System of Units (SI). Celsius (option [B]), Centigrade (option [C]), and Fahrenheit (option [D]) are alternative temperature scales. However, Kelvin is the preferred unit in sciRead more
The SI unit of temperature is; option [A] Kelvin. Kelvin is the base unit for temperature measurement in the International System of Units (SI). Celsius (option [B]), Centigrade (option [C]), and Fahrenheit (option [D]) are alternative temperature scales. However, Kelvin is the preferred unit in scientific contexts and is defined based on absolute zero, making it the standard unit for thermodynamic temperature measurements. Celsius and Centigrade scales share the same unit size, while Fahrenheit is a different scale commonly used in the United States. Understanding the distinction between these temperature scales is essential in various scientific fields, particularly in thermodynamics, physics, and engineering, where precise temperature measurements are crucial for accurate calculations and experiments.
See lessWhich of the following is not a unit of heat?
Among the options provided; option [D] Degree Celsius is not a unit of heat. Instead, it is a unit of temperature measurement on the Celsius scale. Calorie (option [A]), Kilocalorie (option [B]), and Joule (option [C]) are all units used to quantify heat or energy. They represent different scales foRead more
Among the options provided; option [D] Degree Celsius is not a unit of heat. Instead, it is a unit of temperature measurement on the Celsius scale. Calorie (option [A]), Kilocalorie (option [B]), and Joule (option [C]) are all units used to quantify heat or energy. They represent different scales for measuring the amount of heat or energy transferred. Calorie and Kilocalorie are commonly used in the context of food and nutrition to measure the energy content of food, while Joule is the SI unit of energy and is commonly used in scientific and engineering applications to measure heat, work, and energy transfer. Understanding the distinction between temperature and heat is crucial in various fields, including thermodynamics, physics, and engineering.
See lessBolometer is an instrument which measures
The correct answer is option B: Thermal radiation. A bolometer is an instrument used to measure thermal radiation. It detects and quantifies the intensity of infrared or heat radiation emitted by objects. When exposed to thermal radiation, a bolometer undergoes a change in electrical resistance, whiRead more
The correct answer is option B: Thermal radiation. A bolometer is an instrument used to measure thermal radiation. It detects and quantifies the intensity of infrared or heat radiation emitted by objects. When exposed to thermal radiation, a bolometer undergoes a change in electrical resistance, which is then measured to determine the intensity of the radiation. This principle allows bolometers to be used in various applications, including astronomy for studying celestial objects emitting infrared radiation, in thermal imaging devices for detecting heat signatures, and in industrial processes for monitoring temperature and thermal properties. Unlike instruments that measure thermal conductivity, intensity of sound, or specific heat, a bolometer specifically targets thermal radiation, making it a valuable tool in fields where precise measurement of heat energy is necessary for research, monitoring, and analysis.
See lessThe 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 less