CBSE Class 7 Answered
how does clinical thermometre works?
Asked by ajitsahane11121 | 08 Aug, 2019, 01:14: PM
Expert Answer
A thermometer is a device that measures the temperature in a reliable manner. Working of thermometer is based on thermal expansion of liquids.
It is made of a long, narrow, uniform glass tube with a bulb at one end.
The tube appears as a continuous silver line because it is filled with mercury. (There are some thermometers which are filled with coloured alcohol in cold regions.)
Mercury is a metal which is in liquid state at room temperature. It expands or contracts with an increase or decrease in temperature. When the thermometer is filled in a warmer environment, the liquid in the bulb heats up. Due to this it increases in volume and rises in the measuring capillary tube. As the liquid reaches thesame temperature as its environment it stops rising. The number at the top of the column ofliquid in the tube gives the temperature of the body to be measured.
Answered by Shiwani Sawant | 08 Aug, 2019, 03:10: PM
Concept Videos
CBSE 7 - Science
Asked by Divjyot2010 | 09 Oct, 2021, 11:54: AM
ANSWERED BY EXPERTCBSE 7 - Science
Asked by 2958abhi | 22 Jul, 2021, 10:36: AM
ANSWERED BY EXPERTCBSE 7 - Science
Asked by ayushminaljain | 01 Jun, 2021, 08:54: AM
ANSWERED BY EXPERTCBSE 7 - Science
Asked by akritisingh032009 | 18 May, 2021, 07:25: PM
ANSWERED BY EXPERTCBSE 7 - Science
Asked by diyarose | 15 Oct, 2020, 09:28: PM
ANSWERED BY EXPERTCBSE 7 - Science
Asked by manishpro9876 | 14 Oct, 2020, 11:01: AM
ANSWERED BY EXPERTCBSE 7 - Science
Asked by anshikapandey | 19 Jul, 2020, 07:13: AM
ANSWERED BY EXPERTCBSE 7 - Science
Asked by bhardwajrehaan10 | 07 Jul, 2020, 08:06: PM
ANSWERED BY EXPERTCBSE 7 - Science
Asked by yamantakkarodpati38.7tpstl | 03 Jul, 2020, 11:07: AM
ANSWERED BY EXPERTCBSE 7 - Science
Asked by NeWtgamer137 | 01 Jul, 2020, 09:27: AM
ANSWERED BY EXPERT
