From PETER NAYLOR
Mixing ordinary kitchen cornflour with about an equal amount of water
to form a thick mixture reveals some interesting events. Pushing a spoon
in it slowly allows slow progress as the mixture acts like a liquid. However,
any attempt at quick motion of the spoon will result in no progress and
mixture acts like a solid. More dramatically, if you push the spoon down
into the mixture when pouring, the result is a solid stream.
Is this cornflour mixture smart?
Peter Naylor Leatherhead, Surrey
