"Why it's so?"
"Because aluminum does not have memory property," replied the auto component manufacturer.
"Memory property, that's an interesting term! What does that mean?"
I was also curious. Even more enthusiastic was our teacher, in his late fifties, to share his wisdom. How can one resist speaking with two attentive listeners in front?
He twisted the polymer fan blade in his hands and released it. The blade reverted to it original shape. Than he picked up an aluminum sheet and applied same twist. The sheet remained deformed after being released.
"What have you noticed?"
I was to answer, "An example of elasticity," but stopped myself. Every time a question is asked does not necessarily mean that it was done expecting answers to it.) Our silence made the teacher even more fervent.
"Look its the memory property of Polypropylene that allowed it to retain its original shape and integrity after physical manipulation." Then he started explaining how a distorted fan blade can harm the radiator etc. etc.
Through out the rest of the day, the phrase 'memory property' kept reverberating in the cells of my mind. How peaceful lives would have been, had homo-sapiens been with 'memory property'!
All of us have strong 'memory power'. We can remember hundreds of phone numbers, big big passwords and many more things. We can even remember the state before deformation. But we can never revert to it.
"We are, programmed to receive,
You can check out anytime you like...
but you can never leave..."