Liquid-in-glass thermometers operate based on the principle that liquids expand and contract with temperature changes. A liquid, such as mercury or alcohol, is sealed inside a thin glass tube. When the temperature increases, the liquid expands and rises in the tube. Conversely, when the temperatureRead more
Liquid-in-glass thermometers operate based on the principle that liquids expand and contract with temperature changes. A liquid, such as mercury or alcohol, is sealed inside a thin glass tube. When the temperature increases, the liquid expands and rises in the tube. Conversely, when the temperature decreases, the liquid contracts and falls. The level of the liquid corresponds to a temperature scale marked on the thermometer, providing an accurate reading.
For more CBSE Class 6 Science Curiosity Chapter 6 Temperature and its Measurement Extra Questions & Answer:
Mercury thermometers are being phased out because mercury is highly toxic. If a thermometer breaks, the mercury can evaporate and be inhaled, leading to severe health risks, including neurological damage. Additionally, mercury can contaminate the environment, posing long-term ecological hazards. AsRead more
Mercury thermometers are being phased out because mercury is highly toxic. If a thermometer breaks, the mercury can evaporate and be inhaled, leading to severe health risks, including neurological damage. Additionally, mercury can contaminate the environment, posing long-term ecological hazards. As safer alternatives like digital and alcohol-based thermometers have become widely available, the use of mercury thermometers is declining, especially in medical and educational settings.
For more CBSE Class 6 Science Curiosity Chapter 6 Temperature and its Measurement Extra Questions & Answer:
Digital thermometers are devices that use electronic sensors to detect temperature changes and provide a reading on a digital display. They are known for their speed and accuracy, making them popular in medical, industrial, and household contexts. Unlike traditional liquid-in-glass thermometers, digRead more
Digital thermometers are devices that use electronic sensors to detect temperature changes and provide a reading on a digital display. They are known for their speed and accuracy, making them popular in medical, industrial, and household contexts. Unlike traditional liquid-in-glass thermometers, digital thermometers can measure temperature in seconds and are available in various types, including oral, ear, and infrared models. They are user-friendly and often feature memory functions for tracking temperature changes over time.
For more CBSE Class 6 Science Curiosity Chapter 6 Temperature and its Measurement Extra Questions & Answer:
An infrared thermometer is a device that measures temperature by detecting the infrared radiation emitted by an object. Since it doesn't require physical contact, it's ideal for measuring temperatures in situations where conventional thermometers are impractical, such as in industrial settings or whRead more
An infrared thermometer is a device that measures temperature by detecting the infrared radiation emitted by an object. Since it doesn’t require physical contact, it’s ideal for measuring temperatures in situations where conventional thermometers are impractical, such as in industrial settings or when checking a person’s temperature without touching them. Infrared thermometers are fast, provide instant readings, and are often used for safety checks, food inspections, and medical diagnostics.
For more CBSE Class 6 Science Curiosity Chapter 6 Temperature and its Measurement Extra Questions & Answer:
Infrared thermometers operate by detecting the infrared radiation naturally emitted by all objects. These devices contain sensors that capture the infrared energy and convert it into an electrical signal. This signal is then processed to display the corresponding temperature on the screen. InfraredRead more
Infrared thermometers operate by detecting the infrared radiation naturally emitted by all objects. These devices contain sensors that capture the infrared energy and convert it into an electrical signal. This signal is then processed to display the corresponding temperature on the screen. Infrared thermometers are particularly useful for measuring surface temperatures from a distance, making them essential tools in various fields, including healthcare, food safety, and industrial maintenance.
For more CBSE Class 6 Science Curiosity Chapter 6 Temperature and its Measurement Extra Questions & Answer:
The resonance time of a Dead Hall is [A] zero seconds. A Dead Hall, also known as an anechoic chamber, is constructed with highly absorptive materials on all surfaces to eliminate any sound reflections. This intentional design ensures that sound waves are immediately absorbed upon impact with the suRead more
The resonance time of a Dead Hall is [A] zero seconds. A Dead Hall, also known as an anechoic chamber, is constructed with highly absorptive materials on all surfaces to eliminate any sound reflections. This intentional design ensures that sound waves are immediately absorbed upon impact with the surfaces, preventing them from bouncing back and causing reverberation.
Dead Halls are crucial for conducting precise acoustic measurements, testing equipment, and conducting research where minimal acoustic interference is essential. They are used in industries such as aerospace, automotive, and telecommunications to simulate free-field conditions without environmental noise or reverberation.
The concept of a Dead Hall contrasts with conventional halls and auditoriums, which are designed to enhance sound reflection and create desirable reverberation effects for music performance and speech intelligibility. In a Dead Hall, the absence of reverberation ensures accurate acoustic measurements and controlled experimental conditions.
The relation between resonance time and volume of a hall has been propounded by [C] Sabine. Wallace Clement Sabine, an American physicist and pioneer in architectural acoustics, developed a formula to calculate the reverberation time in a room. This formula considers the volume of the room, the surfRead more
The relation between resonance time and volume of a hall has been propounded by [C] Sabine. Wallace Clement Sabine, an American physicist and pioneer in architectural acoustics, developed a formula to calculate the reverberation time in a room. This formula considers the volume of the room, the surface area, and the absorption coefficients of materials used in the room’s construction.
Sabine’s work revolutionized architectural acoustics by providing a quantitative method to predict and control reverberation characteristics in spaces. His formula is essential for designing auditoriums, concert halls, and other venues where optimal acoustics are critical for speech intelligibility, musical clarity, and overall sound quality.
While options [A] (Doppler), [B] (Newton), and [D] (Laplace) contributed significantly to various fields of science, Sabine’s contribution specifically addressed the acoustic properties of enclosed spaces, shaping modern architectural practices in acoustical design.
Sonar (Sound Navigation and Ranging) is primarily used by [D] navigators. It is an essential technology for underwater navigation and detection of objects submerged in water. Sonar systems emit pulses of sound waves that travel through water, reflecting off objects and returning to the source. By anRead more
Sonar (Sound Navigation and Ranging) is primarily used by [D] navigators. It is an essential technology for underwater navigation and detection of objects submerged in water. Sonar systems emit pulses of sound waves that travel through water, reflecting off objects and returning to the source. By analyzing the time delay and characteristics of these sound waves, sonar operators can determine the distance, size, and sometimes the composition of underwater objects.
Sonar finds extensive application in maritime industries, including naval operations for submarine detection, commercial shipping for navigation and collision avoidance, fisheries for locating fish shoals, and underwater mapping for geological and environmental surveys. Its ability to operate effectively in underwater environments where light and electromagnetic waves cannot propagate makes sonar indispensable for underwater exploration and navigation. Thus, navigators primarily use sonar to enhance safety and efficiency in maritime operations.
The stethoscope operates based on the principle of [A] reflection of sound. When the chest piece is placed on the patient's body, it collects sound waves generated by the heart, lungs, or other internal organs. These waves travel through the tubing to the earpieces, where they are amplified and tranRead more
The stethoscope operates based on the principle of [A] reflection of sound. When the chest piece is placed on the patient’s body, it collects sound waves generated by the heart, lungs, or other internal organs. These waves travel through the tubing to the earpieces, where they are amplified and transmitted to the listener’s ears.
Reflection of sound waves from the body’s internal organs allows healthcare providers to hear distinct sounds such as heartbeat rhythms, breathing patterns, and abnormal lung or bowel sounds. By focusing on capturing and transmitting these reflections effectively, the stethoscope aids in diagnosing medical conditions and monitoring patients’ health.
While refraction (option [B]), diffraction (option [C]), and polarization (option [D]) involve other properties of waves, reflection specifically enables the stethoscope to function as a critical tool in auscultation and medical examination. Thus, reflection of sound is essential to how a stethoscope operates.
To hear their echo distinctly, a person should stand approximately [C] 28 feet from a reflecting plane. This distance is crucial because it allows enough time for sound waves emitted by the person to travel to the reflecting surface and back, creating a perceptible delay between the original sound aRead more
To hear their echo distinctly, a person should stand approximately [C] 28 feet from a reflecting plane. This distance is crucial because it allows enough time for sound waves emitted by the person to travel to the reflecting surface and back, creating a perceptible delay between the original sound and its reflected echo.
The specific distance of 28 feet is based on the speed of sound in air (~343 meters per second or ~1125 feet per second at room temperature). Therefore, sound travels approximately 28 feet in 1/10 of a second, which is the minimum time interval typically required for a clear echo to be perceived by the human ear.
Understanding the distance for hearing echoes helps in practical applications such as acoustic design, outdoor activities, and safety in environments where sound reflection may affect communication and perception. Thus, the correct answer for hearing an echo is [C] 28 feet.
How do liquid-in-glass thermometers work?
Liquid-in-glass thermometers operate based on the principle that liquids expand and contract with temperature changes. A liquid, such as mercury or alcohol, is sealed inside a thin glass tube. When the temperature increases, the liquid expands and rises in the tube. Conversely, when the temperatureRead more
Liquid-in-glass thermometers operate based on the principle that liquids expand and contract with temperature changes. A liquid, such as mercury or alcohol, is sealed inside a thin glass tube. When the temperature increases, the liquid expands and rises in the tube. Conversely, when the temperature decreases, the liquid contracts and falls. The level of the liquid corresponds to a temperature scale marked on the thermometer, providing an accurate reading.
For more CBSE Class 6 Science Curiosity Chapter 6 Temperature and its Measurement Extra Questions & Answer:
https://www.tiwariacademy.com/ncert-solutions-class-6-science-curiosity-chapter-7/
See lessWhy are mercury thermometers being phased out?
Mercury thermometers are being phased out because mercury is highly toxic. If a thermometer breaks, the mercury can evaporate and be inhaled, leading to severe health risks, including neurological damage. Additionally, mercury can contaminate the environment, posing long-term ecological hazards. AsRead more
Mercury thermometers are being phased out because mercury is highly toxic. If a thermometer breaks, the mercury can evaporate and be inhaled, leading to severe health risks, including neurological damage. Additionally, mercury can contaminate the environment, posing long-term ecological hazards. As safer alternatives like digital and alcohol-based thermometers have become widely available, the use of mercury thermometers is declining, especially in medical and educational settings.
For more CBSE Class 6 Science Curiosity Chapter 6 Temperature and its Measurement Extra Questions & Answer:
https://www.tiwariacademy.com/ncert-solutions-class-6-science-curiosity-chapter-7/
See lessWhat are digital thermometers?
Digital thermometers are devices that use electronic sensors to detect temperature changes and provide a reading on a digital display. They are known for their speed and accuracy, making them popular in medical, industrial, and household contexts. Unlike traditional liquid-in-glass thermometers, digRead more
Digital thermometers are devices that use electronic sensors to detect temperature changes and provide a reading on a digital display. They are known for their speed and accuracy, making them popular in medical, industrial, and household contexts. Unlike traditional liquid-in-glass thermometers, digital thermometers can measure temperature in seconds and are available in various types, including oral, ear, and infrared models. They are user-friendly and often feature memory functions for tracking temperature changes over time.
For more CBSE Class 6 Science Curiosity Chapter 6 Temperature and its Measurement Extra Questions & Answer:
https://www.tiwariacademy.com/ncert-solutions-class-6-science-curiosity-chapter-7/
See lessWhat is an infrared thermometer?
An infrared thermometer is a device that measures temperature by detecting the infrared radiation emitted by an object. Since it doesn't require physical contact, it's ideal for measuring temperatures in situations where conventional thermometers are impractical, such as in industrial settings or whRead more
An infrared thermometer is a device that measures temperature by detecting the infrared radiation emitted by an object. Since it doesn’t require physical contact, it’s ideal for measuring temperatures in situations where conventional thermometers are impractical, such as in industrial settings or when checking a person’s temperature without touching them. Infrared thermometers are fast, provide instant readings, and are often used for safety checks, food inspections, and medical diagnostics.
For more CBSE Class 6 Science Curiosity Chapter 6 Temperature and its Measurement Extra Questions & Answer:
https://www.tiwariacademy.com/ncert-solutions-class-6-science-curiosity-chapter-7/
See lessHow do infrared thermometers work?
Infrared thermometers operate by detecting the infrared radiation naturally emitted by all objects. These devices contain sensors that capture the infrared energy and convert it into an electrical signal. This signal is then processed to display the corresponding temperature on the screen. InfraredRead more
Infrared thermometers operate by detecting the infrared radiation naturally emitted by all objects. These devices contain sensors that capture the infrared energy and convert it into an electrical signal. This signal is then processed to display the corresponding temperature on the screen. Infrared thermometers are particularly useful for measuring surface temperatures from a distance, making them essential tools in various fields, including healthcare, food safety, and industrial maintenance.
For more CBSE Class 6 Science Curiosity Chapter 6 Temperature and its Measurement Extra Questions & Answer:
https://www.tiwariacademy.com/ncert-solutions-class-6-science-curiosity-chapter-7/
See lessThe resonance time of Dead Hall is
The resonance time of a Dead Hall is [A] zero seconds. A Dead Hall, also known as an anechoic chamber, is constructed with highly absorptive materials on all surfaces to eliminate any sound reflections. This intentional design ensures that sound waves are immediately absorbed upon impact with the suRead more
The resonance time of a Dead Hall is [A] zero seconds. A Dead Hall, also known as an anechoic chamber, is constructed with highly absorptive materials on all surfaces to eliminate any sound reflections. This intentional design ensures that sound waves are immediately absorbed upon impact with the surfaces, preventing them from bouncing back and causing reverberation.
Dead Halls are crucial for conducting precise acoustic measurements, testing equipment, and conducting research where minimal acoustic interference is essential. They are used in industries such as aerospace, automotive, and telecommunications to simulate free-field conditions without environmental noise or reverberation.
The concept of a Dead Hall contrasts with conventional halls and auditoriums, which are designed to enhance sound reflection and create desirable reverberation effects for music performance and speech intelligibility. In a Dead Hall, the absence of reverberation ensures accurate acoustic measurements and controlled experimental conditions.
See lessThe relation between resonance time and volume of Hall has been propounded by
The relation between resonance time and volume of a hall has been propounded by [C] Sabine. Wallace Clement Sabine, an American physicist and pioneer in architectural acoustics, developed a formula to calculate the reverberation time in a room. This formula considers the volume of the room, the surfRead more
The relation between resonance time and volume of a hall has been propounded by [C] Sabine. Wallace Clement Sabine, an American physicist and pioneer in architectural acoustics, developed a formula to calculate the reverberation time in a room. This formula considers the volume of the room, the surface area, and the absorption coefficients of materials used in the room’s construction.
Sabine’s work revolutionized architectural acoustics by providing a quantitative method to predict and control reverberation characteristics in spaces. His formula is essential for designing auditoriums, concert halls, and other venues where optimal acoustics are critical for speech intelligibility, musical clarity, and overall sound quality.
While options [A] (Doppler), [B] (Newton), and [D] (Laplace) contributed significantly to various fields of science, Sabine’s contribution specifically addressed the acoustic properties of enclosed spaces, shaping modern architectural practices in acoustical design.
See lessSonar is mostly used in
Sonar (Sound Navigation and Ranging) is primarily used by [D] navigators. It is an essential technology for underwater navigation and detection of objects submerged in water. Sonar systems emit pulses of sound waves that travel through water, reflecting off objects and returning to the source. By anRead more
Sonar (Sound Navigation and Ranging) is primarily used by [D] navigators. It is an essential technology for underwater navigation and detection of objects submerged in water. Sonar systems emit pulses of sound waves that travel through water, reflecting off objects and returning to the source. By analyzing the time delay and characteristics of these sound waves, sonar operators can determine the distance, size, and sometimes the composition of underwater objects.
Sonar finds extensive application in maritime industries, including naval operations for submarine detection, commercial shipping for navigation and collision avoidance, fisheries for locating fish shoals, and underwater mapping for geological and environmental surveys. Its ability to operate effectively in underwater environments where light and electromagnetic waves cannot propagate makes sonar indispensable for underwater exploration and navigation. Thus, navigators primarily use sonar to enhance safety and efficiency in maritime operations.
See lessOn which principle of sound does the stethoscope work?
The stethoscope operates based on the principle of [A] reflection of sound. When the chest piece is placed on the patient's body, it collects sound waves generated by the heart, lungs, or other internal organs. These waves travel through the tubing to the earpieces, where they are amplified and tranRead more
The stethoscope operates based on the principle of [A] reflection of sound. When the chest piece is placed on the patient’s body, it collects sound waves generated by the heart, lungs, or other internal organs. These waves travel through the tubing to the earpieces, where they are amplified and transmitted to the listener’s ears.
Reflection of sound waves from the body’s internal organs allows healthcare providers to hear distinct sounds such as heartbeat rhythms, breathing patterns, and abnormal lung or bowel sounds. By focusing on capturing and transmitting these reflections effectively, the stethoscope aids in diagnosing medical conditions and monitoring patients’ health.
While refraction (option [B]), diffraction (option [C]), and polarization (option [D]) involve other properties of waves, reflection specifically enables the stethoscope to function as a critical tool in auscultation and medical examination. Thus, reflection of sound is essential to how a stethoscope operates.
See lessHow far should a person stand from the reflecting plane to hear his echo?
To hear their echo distinctly, a person should stand approximately [C] 28 feet from a reflecting plane. This distance is crucial because it allows enough time for sound waves emitted by the person to travel to the reflecting surface and back, creating a perceptible delay between the original sound aRead more
To hear their echo distinctly, a person should stand approximately [C] 28 feet from a reflecting plane. This distance is crucial because it allows enough time for sound waves emitted by the person to travel to the reflecting surface and back, creating a perceptible delay between the original sound and its reflected echo.
The specific distance of 28 feet is based on the speed of sound in air (~343 meters per second or ~1125 feet per second at room temperature). Therefore, sound travels approximately 28 feet in 1/10 of a second, which is the minimum time interval typically required for a clear echo to be perceived by the human ear.
Understanding the distance for hearing echoes helps in practical applications such as acoustic design, outdoor activities, and safety in environments where sound reflection may affect communication and perception. Thus, the correct answer for hearing an echo is [C] 28 feet.
See less