Question about light clock - Part II

EL wrote:
[EL]
Dear John,
If you were inside a moving elevator and had two tight-sealed jars, one
full of chlorine-gas and one full of vacuum (almost empty of matter),
what happens to the trapped gas and the vacuum space, do they move
along with the elevator at its speed or do they stay behind?

You have a 1 liter helium filled balloon on a .5 meter
string attached to the floor of your 3000 liter (internal
volume) minivan, windows closed. What angle does it make to
the horizontal in a clockwise positive sense as the van
acclerates at .1 g?

I don't know the answer, but there is one. :-)


Bob
--

"Things should be described as simply as possible, but no
simpler."

A. Einstein