just talk to her n tell her that what she is doing is unethical. get her to think of how distressed the people who lost their bikes would be. I don't know about warning her on the dangers of the police because it might just add thrill to it.
Picture a simple mercury barometer. It is given the length of the vertical column is 60cm and atmospheric pressure is 76cm Hg.
Is the pressure in the space at the top of the vertical column 0 cmHg or 16 cmHg??
Why??? Thanks :P
