Why roads at mountains are serpentine?
Why roads at mountains are serpentine?
This is to reduce the effort. It follows the principle of a screw which in turn is a modified form of inclined plane.
See the pic on left. Though we have to do a greater work (against friction) the average force or effort is less and the risk or danger of accident is less.
CBSE 2012
CBSE (Central Board of Secondary Education) has started online counselling for students and parents for Board Exams.
The first phase of this pre-exam counselling will start from Wednesday Feb 1,2012 and will continue until April 16 2012, for those appearing for board examinations this year.
Toll Free Number 1800-180-3456 is allotted to talk with experts. Anyone can call between 8 a.m. to midnight from Feb 1 to April 16, 2012.
This year, approximately 67 experts, including principals, trained counsellors from CBSE affiliated government and private schools and few psychologists are participating in tele-counselling.
