Temperature Points on Celsius Scale
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Questions and Answers

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?

    <p>212°F</p> Signup and view all the answers

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

    <p>Celsius scale</p> Signup and view all the answers

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

    <p>+100 K</p> Signup and view all the answers

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

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

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

    <p>To make the water more visible</p> Signup and view all the answers

    Why is mercury used as a thermometric liquid?

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

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

    <p>To prevent leakage of ink</p> Signup and view all the answers

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

    <p>It rises</p> Signup and view all the answers

    What role do the two bricks play in the experiment?

    <p>They act as a stable base for heating the bottle</p> Signup and view all the answers

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

    <p>To avoid the rails from bending sideways due to expansion</p> 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?

    <p>The hot water expands, loosening the stopper</p> Signup and view all the answers

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

    <p>To allow for expansion during hot weather</p> 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?

    <p>To allow for contraction and expansion due to temperature changes</p> Signup and view all the answers

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

    <p>To allow for expansion during heating</p> Signup and view all the answers

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

    <p>It expands the glass stopper</p> Signup and view all the answers

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