Water cannot be used as a thermometric liquid, because it is not helpful to measure below 0°C and above 100°C. Solution: The minimum possible temperature is 0 K. There is no limit to maximum temperature. Answer: Liquid-in-glass thermometers are made of sealed glass and contain a fluid, usually, -- Specification for Laboratory Thermometers, --  Laboratory glassware; special purpose laboratory thermometers, -- Liquid-in-Glass Laboratory Thermometers - Principles of Design, Construction and Use, Industrial Computers and Embedded Systems, Material Handling and Packaging Equipment, Electrical and Electronic Contract Manufacturing, Show all Laboratory Thermometers Manufacturers, National Institute of Standards and Technology (NIST) and the American Society of Testing and Materials (ASTM), Splash Proof, Watertight or Direct Immersion, Advantages include: Low cost, tough, easy to use and install, accurate over a wide range of temperatures. Answer: Question 3. Before use, the mercury level should be below 35°C or 94°F. (c) High accuracy (d) temperature Laboratory thermometers are used to measure temperatures or temperature changes with a high degree of precision. A clinical thermometer is used to measure body temperature. 68°F =_______°F Question 5. (d) A is false but R is true. Why do we use mercury in thermometers? Mostly Alcohol and Mercury are used in thermometers as they remain in liquid form even with a change of temperature in them. (a) lower, higher K = C + 273 When, a liquid is heated, it expands and when it is cooled down, it contracts. Do not place the thermometer in a hot flame or in the hot sun. Clinical thermometer . – 20°C = 273K, Question 7. When gases substance gets heat, it expands; when it cools it contracts. Hence a wide range of temperatures can be measured using a mercury thermometer. Answer: True. Answer: by type, display options, operating environment, and specialty features. Include me in third-party email campaigns and surveys that are relevant to me. So, when Swathi takes out the thermometer, the level can go back because of absence of kink. Question 5. The common laboratory thermometer is a _______ thermometer. The 4 most important are: Solution: Each thermometer has been created specially to make its measurement in a certain place, but absolutely everyone has the same unique function: to measure the temperature of something. Activity – 3 Laboratory thermometers are used to measure the temperature in school and other laboratories for scientific research. (a) expands, Question 3. Fill In the blanks: Question 1. (c) Expands uniformly Discuss and find out the normal temperature of domestic animals and birds. asked Apr 2 in Science by Umesh01 (65.8k points) heat; class-8; 0 votes. Each degree is divided into 10 parts. (c) Celsius Jerk the thermometer a few times to bring the level of the mercury down. (a) Kelvin 0°=________°F ASTM-certified laboratory thermometers must also pass rigorous testing requirements. If it is used to measure the temperature of hot water, the glass will crack/ burst due to excessive pressure created by expansion of mercury. During summer, the air inside the tyre of a vehicle will get heated up with the increase in pressure of the air inside the tyre. What are the uses of laboratory thermometers? Measure your body temperature. (a) rises. Question 3. True. What must be the temperature in Fahrenheit, so that it will be twice its value in Celsius? Mention the three units which are used to measure the temperature. (d) none Explain the precautions to be followed while using clinical thermometer. Answer: Hold bottle with a fork. Calculate the time in sec in which the electron would acquire a velocity double of its initial velocity.who answer first! When water is cooled, observe the surface of water in the refill. International unit of measuring temperature is Parts of a thermometer 1. Answer: – 30°C = _______°F What is the use of kink in clinical thermometers? 45°C = _____ °F Do not tilt the thermometer while measuring the temperature. Temperature is related to how fast the atoms within a substance are moving. A few sharp jerks are given to clinical thermometer before using it. Answer: (b) contracts These days, digital thermometers are available which do not use mercury. How to Draw a Thermometer.Imagine a picture of a thermometer and let your hands do the strokes in creating a good drawing. Answer: Illustrate all the necessary strokes forming the liquid on it. It is used for taking the body temperature. Answer: F = $$\frac { 9c }{ 5 }$$ + 32 Before use, the mercury level in clinical thermometer should be below________, The coldest natural temperature ever recorded on earth is________, The hottest natural temperature ever recorded on earth is________, Temperature of the universe in the earliest moments after the big bang is ________. Question 2. Answer: In humans, the average internal temperature is 98.60°C. Answer: Question 8. (d) Low accuracy (b) digital thermometer Mercury is often used in laboratory thermometers because it =$$\frac { 590 }{ 9 }$$ = 65.9 = 72 + 32 Handle the thermometer with care. As there is no place to air to escape tyre will get bursted. 1 answer. Measuring time using different instruments & know its units of time. Parts of a thermometer 1. Digital thermometers are mainly used to take the body temperature. A labeled diagram shows an image of the device and all parts including he tube and bulb are labeled. Difference = -4°C + 3°C = 7°C Disadvantages include: only indicating types are available, possibility of calibration change due to use or environment, and not as accurate as glass stem thermometers. Use of this website signifies your agreement to our Terms of Use. Clinical thermometer is scaled from 35°C to 42°C or from 94°F to 108°F. Electronic devices such as thermistors measure changes in electrical resistance and convert them to changes in temperature. Then ‘ observe. 68°F = 20°C, Question 4. (d) 35°C to 42°C, Question 4. (a) Kelvin, Question 2. A clinical thermometer is calibrated from to . $$\frac{9 \times 45^{9}}{8}$$ The thermometer which ranger from -10°C to 110°C is . Notify me about educational white papers. Solution: Write the precautions to be following while using a laboratory thermometer. Question 2. Answer: (d) none C = K – 273 (c) conductor, insulator The liquid expands as the temperature rises, rising in the tube and indicating the temperature. Explain how do you determine the temperature of hot water using laboratory thermometer? True, Question 8. as well as subscriptions and other promotional notifications.

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