Physics, asked by sanvi2370, 10 months ago

Give reasons for the following.

a- When we touch a steel rod and a paper sheet simultaneously, we find that the rod is cooler than the paper sheet.

b- Mercury is widely used in clinical thermometers.

c- The handles of cooking vessels are generally made up of or covered with plastic or wood.​

Answers

Answered by 13rokendreamer
2

Answer:

Paper is a bad conductor of heat/cold whereas steel is a good conductor of heat/cold. So it is cooler to touch

Mercury does not stick to the sides of the thermometer, so giving accurate measurements. That's why it is used in thermometer.

Plastic or wood are a bad conductor of heat, so it prevents burning of hands. It also doesn't melt easily (in case of plastics). So, it is used as handles of cooking vessels

Answered by komal6617
3

a- We find that the rod is cooler than the paper sheet because the molecules of rod are tightly packed while paper sheet's molecules are not tightly packed.

b- Mercury has the hight coefficient of expansion. That's why it is widely used in clinical thermometers.

c- Because plastic and wood materials are bad conductors of heat and they cannot allow heat of the flame to the person's hand.

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