What is the function of thermometer in laboratory?
A laboratory thermometer, which is colloquially known as the lab thermometer, is used for measuring temperatures other than the human body temperature. It ranges from -10˚C to 110˚C. Laboratory thermometers are designed for lab purposes such as checking boiling point, freezing point, or temperature of other substances.
What are the four uses of thermometer?
– To measure the outdoor temperature. – To measure body temperature during a physical exam at the doctors. – To measure body temperature when someone is ill to determine if he/she has a fever. – To measure the temperature of an oven.
What are the parts of thermometer and their functions?
The capillary of a mercury thermometer is the long cylindrical tube that is connected to the bulb. As temperature increases, mercury flows up the capillary. The further the mercury moves up the capillary, the higher the measured temperature. The capillary ends in a section known as the expansion chamber.
What is thermometer answer short?
A thermometer is a tool that measures temperature — how hot or cold something is. Thermometers are used to see if you have a fever or tell you how cold it is outside. Made up of thermo (heat) and meter (measuring device), the meaning of the word thermometer is pretty straightforward.
What is laboratory thermometer for Class 7th?
Laboratory or Lab thermometers are the instruments that are used to measure the temperatures for scientific researches in schools and labs. Lab thermometers are designed to measure the temperatures, the boiling point and the freezing point of substances.
How is a thermometer used in chemistry?
Place the end of the thermometer with the reservoir of liquid in the testing medium. For example, if you are testing the temperature of ice water, place the reservoir in the water, below the ice, but not touching the bottom of the flask or cup the water is held in. This will garner a more accurate temperature.
What is the use of thermometer Class 7?
Thermometer is a device which is used to measure temperature. Thermometer is made of a long narrow glass tube, with a bulb at one end. The narrow tube appears as a continuous silver line, because it is filled with mercury.
What is the use of thermometer Class 8?
It is basically used to measure the temperature of human body. This thermometer is used to measure the temperature of all things, except the human body. A clinical thermometer has a temperature range of only 35 ºC to 42 °C. A laboratory thermometer has a temperature range of -10 ºC to 110 ºC.
What is the function of a mercury in a thermometer?
Mercury is the only one in liquid state at room temperature. It's used in thermometers because it has high coefficient of expansion. Hence, the slightest change in temperature is notable when it's used in a thermometer. It also has a high boiling point which makes it very suitable to measure higher temperatures.
What is the function of the bulb in a thermometer?
The bulb in a thermometer is filled with mercury. When the bulb is heated, mercury in the bulb expands and rises up in the capillary tube. The height of the mercury gives the reading of temperature.
What is a thermometer Class 7?
Thermometer is a device which is used to measure temperature. Thermometer is made of a long narrow glass tube, with a bulb at one end. The narrow tube appears as a continuous silver line, because it is filled with mercury.
What is a thermometer Wikipedia?
A thermometer is a device that measures temperature or a temperature gradient (the degree of hotness or coldness of an object).
What is thermometer Wikipedia?
A thermometer is a device that measures temperature or a temperature gradient (the degree of hotness or coldness of an object).
What is the SI unit of temperature?
kelvin The kelvin is the SI unit of thermodynamic temperature, and one of the seven SI base units. Unusually in the SI, we also define another unit of temperature, called the degree Celsius (°C). Temperature in degrees Celsius is obtained by subtracting 273.15 from the numerical value of the temperature expressed in kelvin.
How is temperature measure?
The more energy of motion the molecules have, the higher the temperature you feel in the air. Air temperature is measured with thermometers. Common thermometers consist of a glass rod with a very thin tube in it. The tube contains a liquid that is supplied from a reservoir, or "bulb," at the base of the thermometer.
Do thermometers measure heat?
Despite its name, however, a thermometer does not actually record heat, but rather temperature. Temperature and heat are two radically different concepts. A thermometer with Celsius and Farenheit scales. Temperature is a measure of the average kinetic energy of the molecules within a substance.
What is temperature Ncert?
Temperature is the degree of hotness or coldness of a place or a body. Heat Energy is the form of energy, which flows from a hot body to cold body. Conduction is the mode of heat transfer when two bodies come in contact and is primary mode of heat transfer in solids.
What is mercury used for?
Mercury is used primarily for the manufacture of industrial chemicals or for electrical and electronic applications. It is used in some liquid-in-glass thermometers, especially those used to measure high temperatures.
What is the function of mercury in thermometer?
In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked on the tube. With changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale. Mercury thermometers can be used to determine body, liquid, and vapor temperature.
How does a liquid thermometer work?
The way a thermometer works is an example of heating and cooling a liquid. When heated, the molecules of the liquid in the thermometer move faster, causing them to get a little further apart. This results in movement up the thermometer.
What is thermometric thermometer?
The thermometric substance is the material used in the thermometer, whose property varies with temperature. In order to assemble a thermometer, we use a substance that has some physical property which changes constantly as the temperature changes. Such substance is known as a thermometric substance.
How do we measure temperature?
Air temperature is measured with thermometers. Common thermometers consist of a glass rod with a very thin tube in it. The tube contains a liquid that is supplied from a reservoir, or "bulb," at the base of the thermometer. Sometimes the liquid is mercury, and sometimes it is red-colored alcohol.
Who made thermometer?
The Italian, Santorio Santorio (1561-1636) is generally credited with having applied a scale to an air thermoscope at least as early as 1612 and thus is thought to be the inventor of the thermometer as a temperature measuring device.
What is the difference between heat and temperature?
Heat is a measure of change, never a property possessed by an object or system. Therefore, it is classified as a process variable. Temperature describes the average kinetic energy of molecules within a material or system and is measured in Celsius (°C), Kelvin(K), Fahrenheit (°F), or Rankine (R).
How do you read a thermometer?
Place the thermometer tip under the tongue. Hold the thermometer in the same spot for about 40 seconds. Readings will continue to increase and the F (or C) symbol will flash during measurement. Usually, the thermometer will make a beeping noise when the final reading is done (usually about 30 seconds).
What is the unit of temperature?
kelvin The kelvin is the SI unit of thermodynamic temperature, and one of the seven SI base units. Unusually in the SI, we also define another unit of temperature, called the degree Celsius (°C). Temperature in degrees Celsius is obtained by subtracting 273.15 from the numerical value of the temperature expressed in kelvin.
How does a thermometer work for fever?
Digital thermometers work by using heat sensors that determine body temperature. They can be used to take temperature readings in the mouth, rectum, or armpit. When assessing digital thermometer readings, keep in mind that armpit (axillary) temperature runs about ½ to 1°F (0.6°C) cooler than oral readings.
What is called temperature class 7?
Answer: Temperature is the degree of hotness or coldness of a place or a body. Heat Energy is the form of energy, which flows from a hot body to cold body.
What Colour is mercury?
light grey color What does Mercury look like? Here you can see that Mercury is a light grey color.
What is iron used for?
Uses of iron Iron is used to make alloy steels like carbon steels with additives such as nickel, chromium, vanadium, tungsten, and manganese. These are used to make bridges, electricity pylons, bicycle chains, cutting tools and rifle barrels. Cast iron contains 3–5% carbon. It is used for pipes, valves, and pumps.