temperature
When the temperature changes, how long it takes for the thermometer to catch up and show the correct value.
The one where you use your mum
Depending on the type of thermometer you have, it can be taken orally, rectally, under the arm, in the ear.
Each and every thermometer has both the scales that is Fahrenheit and Celsius both. Celsius is not specific for India. You can use the scale that you are comfortable with.
If you mean by an "ordinary" thermometer, a mercury thermometer, the bimetallic type can measure a far greater range of temperature (mercury freezes at -38oC and boils at 356oC making it useless in the polar regions or for measuring high temperatures).Bimetallic thermometers are also more robust; mercury thermometers are usually made from glass and are fragile.
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dial thermometer
Temperature major through a thermometer, one is contact type thermometer another one non contact type.Non contact type thermometer known as laser thermometer. With non contact type thermometer or leaser thermometer you will read out temperature from a particular long distance without contact the particular point which temperature want to know.Contact type thermometers are glass type thermometers, analogue or digital read out type. Digital thermometer and analogue dial read out type thermometer have a sensor and that sensors must be to touch hot or cold point to read the temperature.Best use of contact type thermometer is uses full in a closed area. To know grill temperature of a slip Air Condition best use nonContact thermometer to read exact temperature.
Thermometer
thermometer
Nothing will happen, except the thermometer will show the fridge's interior temperature.
It is a thermometer using the platinum wire as sensor (resistance thermometer); the resistance of the wire is proportional to the temperature. This type of thermometer is used under 600 0C.
Meat thermometer.
When the temperature changes, how long it takes for the thermometer to catch up and show the correct value.
A thermometer.
Meteorologists.