What is a laboratory thermometer Class 7?
Laboratory or Lab thermometers are the instruments that are used to measure the temperatures for scientific researches in schools and labs. Fig. – Laboratory Thermometer. Lab thermometers are designed to measure the temperatures, the boiling point and the freezing point of substances.
What is laboratory thermometer for Class 6?
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 is thermometer explain with diagram?
A thermometer measures temperature through a glass tube sealed with mercury that expands or contracts as the temperature rises or falls. As temperatures rise, the mercury-filled bulb expands into the capillary tube. Its rate of expansion is calibrated on the glass scale.
What is lab thermometer?
Laboratory thermometers are devices used to measure temperature. There are many types of lab thermometers such as differential, mechanical, logging, etc. Laboratory thermometers are progressively providing digital reading displays and are input-capable to computer and software programs for logging purposes.
What is laboratory thermometer in short form?
A laboratory thermometer is used to measure temperatures or the temperature changes of other objects. These thermometers are usually filled with red spirit rather than mercury. The range of a laboratory thermometer is generally from −10°C to 110°C.
How do we read laboratory thermometer?
Reading of thermometer and measuring of temperature:
- Take a clinical thermometer and hold it horizontally with reading scale towards your eye.
- Do not hold the thermometer from the bulb.
- Rotate the thermometer slightly clockwise and anticlockwise.
- The end of the silvery thread shows the reading of temperature.
What is laboratory thermometer explain the construction and working with the help of neat diagram?
Mercury thermometer can be used to measure both hot and cold substances. Usually,laboratory thermometer is made in Celsius scale ranging from −10°Cto110°C.It is used to measure temperature with high accuracy.It is constructed on the basis of mercury based thermometers.
Where are laboratory thermometers used?
A laboratory thermometer is used to measure the boiling point and freezing point during science experiments. It is also used to measure the temperature of substances.
What are the parts of a laboratory thermometer?
The main parts of a mercury thermometer are the capillary, the bulb, the scale, and the expansion chamber.
- Spherical Bulb. The bulb is the lowest part of the thermometer, which has a spherical shape.
- Capillary Tube.
- Expansion Chamber.
- Scale Lines.
- Safety Precautions.
How do we read a laboratory thermometer Class 7 answer?
Statement I: One should hold the lab thermometer vertically upright in order to measure the temperature of liquid correctly. Statement II: The bulb of the lab thermometer should touch the bottom of the container containing the liquid while measuring the temperature.
What is laboratory temperature?
Ideal Laboratory Temperature and Humidity Conditions In the U.S., the Food and Drug Administration’s regulatory guidelines outline an optimal temperature for labs as being between 68 °F and 77 °F (20 °C and 25 °C) with humidity levels somewhere between 30% and 50%.
How many types of laboratory thermometers are there?
The common types of laboratory thermometers include liquid-in-glass, bimetallic strip, infrared, and electronic devices. The common types of clinical thermometers are digital, disposable, glass and mercury, electronic ear, and forehead devices.
How is laboratory thermometer constructed?
Laboratory thermometer consists of a thick walled fine bore glass capillary tube. It has a small thin bulb at its lower end and it is filled with pure /dry Hg or colored alcohol. The portion of the capillary tube above the bulb is commonly called stem.
What is the shape of thermometer?
Explanation: Thermometer is purposely shaped into a Prism so that when you hold the thermometer with the reading scale on your reading side. Then the light entering the prism should be reflected towards its base thereby allowing the Mercury inside it to shine and easy to see.
How do we read a laboratory thermometer?
How is a laboratory thermometer constructed?
How to draw a thermometer?
First things first we draw an elongated oval. It would be very good if you could draw the thermometer without a ruler. Step 2 Then draw a straight (as an arrow) line that runs in the middle of the figure from the previous step. Step 3 Using a curved line draw the stem on the left side of the thermometer.
What are the characteristics of a good thermometer?
Temperaturehermometer. By definition,the temperature is the measurable extent of hotness or coldness.
What are the different parts of a thermometer?
Bulb. The bulb is the basis of mercury thermometers.
What are the three types of thermometer?
– Three types of thermometers are alcohol, liquid crystal, and infrared radiation (pyrometer). – The three main temperature scales are Celsius, Fahrenheit, and Kelvin. – The three phases of water (ice, liquid water, and water vapor) can coexist at a single pressure and temperature known as the triple point.