Question

what was the need for inventions of machines
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Answer 1

Answer:

the need of invention of machines is because of man's curiosity abt things and inventions of machines make our life easier from past to the present and future too

Answer 2

We decided to find out and give them their due.
Chewing gum that fixes your teeth. ...
A mouth guard that can detect concussions. ...
An Internet-enabled, portable hand sanitizer. ...
A smokeless solar cooker for developing countries. ...
A cheap, portable water filtration device. ...
Water pipes that monitor their own leaks