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प्रश्न
Write an activity to show that synthetic fibres are stronger than the cotton fibres.
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उत्तर
Activity: Take threads of cotton and nylon (synthetic fibres) of about the same length and thickness. Hang cotton, thread from a stand. Attach a pan at the other end of the thread.
Add weights, one by one, to the pan until the thread breaks (see figure) note the total weight required to break the cotton thread. This gives a measure of the tensile strength of the thread. Repeat the same with nylon thread.
Arrangement to determine the relatives strengths of natural fibres and synthetic fibres.
Conclusion
Much more weight is required to break the nylon thread showing that nylon thread has greater strength than the cotton thread.
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संबंधित प्रश्न
Fill in the blanks with appropriate words.
Synthetic fibres are synthesised from raw materials called ______
Give reason.
Why umbrellas are made up of synthetic clothes?
True or False
It is good to wear clothes made of synthetic fibres while cooking.
The world’s most valuable fiber is ______.
Cotton is a natural polymer. What is its chemical name?
A synthetic fiber which looks like silk is obtained by chemical treatment of wood pulp. It is, therefore, known as artificial silk. What is its common name?
The first fully synthetic fibre was ______.
Unscramble the jumbled word given below, related to synthetic material.
Anory
Write the importance of synthetic polymers in our life.
______ is a synthetic fibre which is strong and elastic that it has the ability to bounce.
