Question

Collect some materials such as pen, book, steel spoon, plate, sponge, rubber band and observe their shape and try to compress them by applying force.  Take a syringe and try to press its piston by closing its nozzle with your thumb.  Remove the piston and fill the syringe with water and insert the piston back. Try to press its piston by closing its nozzle with your thumb.  Takeout water from the syringe and dry it and fill it with some common salt and insert the piston back. Try to press its piston again by closing its nozzle with your thumb.  Observe in which case the piston easily pushed in?  Note down your observations.

Answer 1

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