give an activity to compare the tensile strength of fibres
Answers
Explanation:
(ii) Determine the tensile strength of each fibre as explained in experiment-1. (iii) Soak the woolen thread in a dilute solution of sodium hydroxide for five minutes. ... (iv) Now take another piece of woolen thread of the same size and diameter and soak it in a dilute solution of hydrochloric acid for five minutes.
Answer:
Tie ine end of a cotton thread to a hook fixed to a rigid body and the other end to a pan of a balance .Put some weight in small steps, till the thread breaks . Note the total weight, including that of the pan, required to break the thread. Repeat the activity with other kinds of fibres , e.g., wool, silk, nylon and polyester, if similar thickness and the same length. The different weight required to break the threads will give comparative values of their tensile strength.