A fountain pen Works on the principle of
1). flow of liquids from higher to lower potential
2). capillary action
3). Bernoullis principle
4). Viscosity of liquids
1. How much calorie of energy is released by a boiled egg ?
2. An oil drop spreads over water because
3. The passage of an electric current through a conducting liquid causes ___________.
5. Energy that is produced commercially from coal is called
6. The mass of proton and mass of ________ is same.
7. Tape recorder should not be kept near one of the following things:
8. If an object moves with constant velocity,