Advertisements
Advertisements
प्रश्न
Write an activity to show that synthetic fibres are stronger than the cotton fibres.
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Give examples which indicate that nylon fibres are very strong.
List the advantages of synthetic fibres.
Complete the Analogy:
______: Films:: Nylon: Fishing nets.
What do you mean by synthetic fiber?
The material similar to silk in appearance is ______.
The most suitable material for the preparation of handles of cooking utensils is ______.
Which of the following groups contain all synthetic substances?
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?
Indicate whether the following statement is True or False. Also write the false statement in their correct form.
Synthetic fibres do not melt on heating
