How do you stick a straw in an apple?
Just stab it with it. if it is not an extremely weak straw or an
extremely firm apple, it should go into it. whether you'll be able
to drink anything or not, I don't think so. I'd try it with an
orange or other citrus fruit. would be easier to get juice out of
:)
EDIT:
If you hold your thumb over one end of the straw, being careful
to ensure a seal, when you push the straw against the apples skin,
you will have formed a seal at both ends of the straw. As such the
air in the straw is trapped.
In order for the straw to deform (as it would tend to do by
buckling, folding or bending when you try to force it into the
apple) it must now compress the air in the straw rather than simply
forcing it out of the open hole at the top. This is significantly
more difficult, as the compressed air pushes back against the
internal walls of the straw.
This therefore means that a larger force would be required to
compress the air and cause the straw to bend or buckle. In other
words the straw is now stiffer / more rigid than it was. As more
force can now be applied to the straw before it will deform, it is
more likely to pierce the apple.