-3
$\begingroup$

A brewing cup of tea sits on my desk.
Full of water and milk
When I put the cup down I was very careful not to spill a drop
When I came back 2 minutes later, my desk was damp with hot tea.

Why???

Hint: The tea is brewing. Tea bags are in the cup.

$\endgroup$
  • 5
    $\begingroup$ Someone clearly knocked your tea over. What a jerk! $\endgroup$ – Ian MacDonald Jun 12 '15 at 11:53
7
$\begingroup$

Not really sure if this is a riddle as I have had it happen to me :P The tea absorbed up the teabag string and then dripped down the outside of the mug. It usually takes a little longer than 2 min though...

$\endgroup$
  • $\begingroup$ Capillary action ftw $\endgroup$ – JamesENL Jun 12 '15 at 0:57
  • $\begingroup$ Is it physically possible? If liquid enters the string because of capillary action, why would it be going to leave it? This would make a perpetuum mobile. $\endgroup$ – Voitcus Jun 12 '15 at 10:54
  • $\begingroup$ It leaves it because it becomes saturated and the end of the string that is not in the tea allows an escape. $\endgroup$ – Ian MacDonald Jun 12 '15 at 11:53
0
$\begingroup$

The cup is made of paper, and the paper is thick enough so that the desk is only damp after two minutes and not drenched.

$\endgroup$

Not the answer you're looking for? Browse other questions tagged or ask your own question.