Question

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Answer 1

Answer:

(1)mercury is used in thermometers because it is the only liquid at room temperature and it has high coefficient of expansion

(2)a.digital thermometer

b.electronic ear thermometer

(3)the three types of heat transfer are-

a. conduction

b.convection

c.radiation

(4)Laboratory thermometer are used to measure temperatures or temperature changes with a high degree of precision

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Answer 2

Answer:

Explanation:mercury is used in thermometers as it is a liquid form of gas and only liquid can be there in thermometers to give proper understanding.

There are two major types of thermometers

1- clinical thermometers

2- laboratory thermometers

Clinical thermometers- the thermometers used for measuring the temperature of human body is called clinical thermometer

The temperature scale of this thermometer is 35°C to 42°C

It has a kink to prevent back flow of mercury into the bulb when taken out from the mouth

MODES OF HEAT TRANSFER-

CONVECTION

CONDUCTION

RADIATION

LABORATORY THERMOMETERS-

A laboratory thermometer is used to measure temperature in science laboratory.

The temperature scale -10°C to 110°C

It can not be used to measure a human body temperature as the thermometer taken out from the mouth the mercury will go back to bulb

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