Why does a fountain pen leak in aeroplane flying at a height?
1). Because of reduced viscosity of the ink in the pen
2). Because of increased viscosity of the ink in the pen
3). Because of higher atmospheric pressure outside the pen
4). Because of lower atmospheric pressure outside the pen
1. Sextant is an instrument used in which of the following ?
2. UV rays coming from Sun, majorly causes which cancer?
5. The surface tension of water on adding detergent to it
8. Which of the following is arranged in order of decreasing conductivity?