Question

Name any three example of each that float and sink in water

Answer 1

Things denser than water generally sink but anything which weighs less than the amount of water it displaces will float.

Example: take all the metal used to build a boat and compress it to the smallest possible size - it will sink.

Unless the metal is some metal or alloy that is less dense than water - is a piece of aluminum less dense than water?? Is there a metal or alloy that is less dense than water - not sure.

Assume the metal is steel.

Take that metal and remake the boat, with a hull shape that displays more water, by weight, than the metal weighs, and it will float.

Take a bag of gravel and throw it in the water and it will sink (assuming the bag isn’t made of think plastic or such that will displace more water than the weight of the gravel and bag) think of a bag made out of cotton netting.

Take that gravel, add sand and cement, cast the resulting concrete into the shape of a hull which will display more water, again by weight, than the concrete and you’ll have a concrete boat that will float.

I’ve seen boats cast with concrete and they floated.

Answer 2

Answer:

FLOAT'S ON WATER:-

wood

plastic

stick.

SINK'S IN WATER:-

iron

rubber ball

stone