Temperature Points on Celsius Scale

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What is the temperature of ice point on the Celsius scale?

212°F

0°C (correct)

100°C

32°F

Where is the upper fixed point located on the Fahrenheit scale?

0°F

100°F

32°F

212°F (correct)

What is the equivalent of ice point in Kelvin scale?

-273 K

373 K

0 K

273 K (correct)

What is the steam point value in Fahrenheit scale?

212°F Signup and view all the answers

Which scale has the upper fixed point at 100°C?

Celsius scale Signup and view all the answers

At what temperature does water start changing into steam at normal atmospheric pressure on the Kelvin scale?

+100 K Signup and view all the answers

Why is one end of the girder not fixed into the concrete or brick pillars?

To allow for free expansion and contraction of the girder in response to temperature changes Signup and view all the answers

What is the purpose of adding ink to the water in the experiment described?

To make the water more visible Signup and view all the answers

Why is mercury used as a thermometric liquid?

Because it expands more and uniformly over a wide range of temperatures Signup and view all the answers

In the experiment, why is the cork in the bottle tightly fitted?

To prevent leakage of ink Signup and view all the answers

What happens to the water level in the straw when the bottle is heated?

It rises Signup and view all the answers

What role do the two bricks play in the experiment?

They act as a stable base for heating the bottle Signup and view all the answers

Why is it important to leave gaps between successive rails on a railway track?

To avoid the rails from bending sideways due to expansion Signup and view all the answers

Why does pouring hot water on the neck of a bottle help in removing a glass stopper stuck inside?

The hot water expands, loosening the stopper Signup and view all the answers

Why are cement floors laid in small pieces with gaps in between?

To allow for expansion during hot weather Signup and view all the answers

What is the purpose of not fixing one end of a steel girder in a bridge, but keeping it on rollers?

To allow for contraction and expansion due to temperature changes Signup and view all the answers

Why are iron tyres of bullock-cart wheels made slightly smaller than the wooden wheels?

To allow for expansion during heating Signup and view all the answers

How does heating a glass stopper stuck in a bottle neck help in removing it?

It expands the glass stopper Signup and view all the answers