Among the options provided, water has the highest heat capacity. Heat capacity is the amount of heat energy required to raise the temperature of a substance by one degree Celsius. Water's high heat capacity means it can absorb and store a large amount of heat energy with only a small change in tempeRead more
Among the options provided, water has the highest heat capacity. Heat capacity is the amount of heat energy required to raise the temperature of a substance by one degree Celsius. Water’s high heat capacity means it can absorb and store a large amount of heat energy with only a small change in temperature. This property makes water exceptionally effective at regulating temperature, which is why it is widely used as a coolant in various applications and plays a crucial role in climate and weather patterns.
In contrast, substances like iron, gold, and benzene have much lower heat capacities, meaning they heat up and cool down more quickly when exposed to heat. Water’s superior heat capacity makes it unique and highly valuable for thermal management. Therefore, the correct answer is [B] Water.
Wearing two thin shirts in winter is more comfortable than wearing one thick shirt due to the insulating effect of the air layer trapped between the two shirts. Air is a poor conductor of heat, which makes it an excellent insulator. When you wear two thin shirts, the layer of air between them acts aRead more
Wearing two thin shirts in winter is more comfortable than wearing one thick shirt due to the insulating effect of the air layer trapped between the two shirts. Air is a poor conductor of heat, which makes it an excellent insulator. When you wear two thin shirts, the layer of air between them acts as an insulating barrier that reduces the transfer of heat from your body to the colder external environment.
This trapped air layer minimizes heat loss and retains body warmth more effectively than a single thick shirt, which lacks this additional insulating layer. The combined effect of the two shirts and the insulating air layer creates a more efficient thermal barrier, enhancing warmth and comfort in cold weather. Thus, the correct answer is [C] The layer of air between two shirts works as a medium of insulation.
Sealed biscuits become crispy when stored in the refrigerator due to the low humidity environment within the fridge. Refrigerators are designed to keep the air dry, which helps in preserving food by reducing moisture levels. When biscuits are placed in this low-humidity environment, any excess moistRead more
Sealed biscuits become crispy when stored in the refrigerator due to the low humidity environment within the fridge. Refrigerators are designed to keep the air dry, which helps in preserving food by reducing moisture levels. When biscuits are placed in this low-humidity environment, any excess moisture present in them is absorbed by the dry air, effectively removing it from the biscuits. This drying process helps to restore and maintain the crispiness of the biscuits, as moisture is the primary factor that makes them soft and soggy.
Unlike options that suggest high humidity or pressure effects, the actual mechanism involves the refrigerator’s ability to lower humidity, creating a drying effect on the food items stored within. Therefore, the correct answer is [B] Humidity inside the refrigerator reduces and hence excess moisture is absorbed, which keeps the biscuits crispy.
To measure extremely high temperatures, such as 2000 °C, a total radiation pyrometer is the appropriate instrument. Total radiation pyrometers function by detecting the thermal radiation emitted by an object and converting this radiation into a temperature reading. This method is particularly effectRead more
To measure extremely high temperatures, such as 2000 °C, a total radiation pyrometer is the appropriate instrument. Total radiation pyrometers function by detecting the thermal radiation emitted by an object and converting this radiation into a temperature reading. This method is particularly effective for high-temperature measurements where direct contact methods, such as mercury or gas thermometers, are impractical or unsafe.
Mercury thermometers and gas thermometers are typically limited to much lower temperature ranges and would not withstand the extreme heat of 2000 °C. Vapor pressure thermometers also cannot measure such high temperatures, as they rely on the vapor pressure of a liquid, which would not be stable at these levels. Total radiation pyrometers, however, are designed specifically for such conditions, making them ideal for industrial applications involving furnaces, kilns, and other high-temperature environments. Therefore, the correct answer is [C] Total radiation pyrometer.
The incorrect statement among the given options is [B] Both air conditioner and air cooler control humidity. Air conditioners are designed to control both the temperature and humidity levels in a room. They work by removing heat and moisture from the air, thus lowering both the temperature and humidRead more
The incorrect statement among the given options is [B] Both air conditioner and air cooler control humidity. Air conditioners are designed to control both the temperature and humidity levels in a room. They work by removing heat and moisture from the air, thus lowering both the temperature and humidity. On the other hand, air coolers operate using the principle of evaporative cooling, which involves blowing air through water-soaked pads. This process adds moisture to the air, thereby not controlling but actually increasing humidity.
While air conditioners effectively manage and reduce humidity, air coolers can make the air more humid, especially in already humid environments. Therefore, the statement that both air conditioners and air coolers control humidity is incorrect. Thus, [B] is the incorrect statement, as air coolers do not have the capability to control or reduce humidity levels effectively.
Which of the following has higher heat capacity?
Among the options provided, water has the highest heat capacity. Heat capacity is the amount of heat energy required to raise the temperature of a substance by one degree Celsius. Water's high heat capacity means it can absorb and store a large amount of heat energy with only a small change in tempeRead more
Among the options provided, water has the highest heat capacity. Heat capacity is the amount of heat energy required to raise the temperature of a substance by one degree Celsius. Water’s high heat capacity means it can absorb and store a large amount of heat energy with only a small change in temperature. This property makes water exceptionally effective at regulating temperature, which is why it is widely used as a coolant in various applications and plays a crucial role in climate and weather patterns.
In contrast, substances like iron, gold, and benzene have much lower heat capacities, meaning they heat up and cool down more quickly when exposed to heat. Water’s superior heat capacity makes it unique and highly valuable for thermal management. Therefore, the correct answer is [B] Water.
See lessIn winter, two thin shirts give us more comfort than one thick shirt because
Wearing two thin shirts in winter is more comfortable than wearing one thick shirt due to the insulating effect of the air layer trapped between the two shirts. Air is a poor conductor of heat, which makes it an excellent insulator. When you wear two thin shirts, the layer of air between them acts aRead more
Wearing two thin shirts in winter is more comfortable than wearing one thick shirt due to the insulating effect of the air layer trapped between the two shirts. Air is a poor conductor of heat, which makes it an excellent insulator. When you wear two thin shirts, the layer of air between them acts as an insulating barrier that reduces the transfer of heat from your body to the colder external environment.
This trapped air layer minimizes heat loss and retains body warmth more effectively than a single thick shirt, which lacks this additional insulating layer. The combined effect of the two shirts and the insulating air layer creates a more efficient thermal barrier, enhancing warmth and comfort in cold weather. Thus, the correct answer is [C] The layer of air between two shirts works as a medium of insulation.
See lessWhen sealed biscuits are kept inside the refrigerator for some time, they become crispy because
Sealed biscuits become crispy when stored in the refrigerator due to the low humidity environment within the fridge. Refrigerators are designed to keep the air dry, which helps in preserving food by reducing moisture levels. When biscuits are placed in this low-humidity environment, any excess moistRead more
Sealed biscuits become crispy when stored in the refrigerator due to the low humidity environment within the fridge. Refrigerators are designed to keep the air dry, which helps in preserving food by reducing moisture levels. When biscuits are placed in this low-humidity environment, any excess moisture present in them is absorbed by the dry air, effectively removing it from the biscuits. This drying process helps to restore and maintain the crispiness of the biscuits, as moisture is the primary factor that makes them soft and soggy.
Unlike options that suggest high humidity or pressure effects, the actual mechanism involves the refrigerator’s ability to lower humidity, creating a drying effect on the food items stored within. Therefore, the correct answer is [B] Humidity inside the refrigerator reduces and hence excess moisture is absorbed, which keeps the biscuits crispy.
See lessA thermometer suitable for measuring 2000 °C is
To measure extremely high temperatures, such as 2000 °C, a total radiation pyrometer is the appropriate instrument. Total radiation pyrometers function by detecting the thermal radiation emitted by an object and converting this radiation into a temperature reading. This method is particularly effectRead more
To measure extremely high temperatures, such as 2000 °C, a total radiation pyrometer is the appropriate instrument. Total radiation pyrometers function by detecting the thermal radiation emitted by an object and converting this radiation into a temperature reading. This method is particularly effective for high-temperature measurements where direct contact methods, such as mercury or gas thermometers, are impractical or unsafe.
Mercury thermometers and gas thermometers are typically limited to much lower temperature ranges and would not withstand the extreme heat of 2000 °C. Vapor pressure thermometers also cannot measure such high temperatures, as they rely on the vapor pressure of a liquid, which would not be stable at these levels. Total radiation pyrometers, however, are designed specifically for such conditions, making them ideal for industrial applications involving furnaces, kilns, and other high-temperature environments. Therefore, the correct answer is [C] Total radiation pyrometer.
See lessWhich of the following statements is Not correct?
The incorrect statement among the given options is [B] Both air conditioner and air cooler control humidity. Air conditioners are designed to control both the temperature and humidity levels in a room. They work by removing heat and moisture from the air, thus lowering both the temperature and humidRead more
The incorrect statement among the given options is [B] Both air conditioner and air cooler control humidity. Air conditioners are designed to control both the temperature and humidity levels in a room. They work by removing heat and moisture from the air, thus lowering both the temperature and humidity. On the other hand, air coolers operate using the principle of evaporative cooling, which involves blowing air through water-soaked pads. This process adds moisture to the air, thereby not controlling but actually increasing humidity.
While air conditioners effectively manage and reduce humidity, air coolers can make the air more humid, especially in already humid environments. Therefore, the statement that both air conditioners and air coolers control humidity is incorrect. Thus, [B] is the incorrect statement, as air coolers do not have the capability to control or reduce humidity levels effectively.
See less