A ball rolling along the ground gradually slows down and finally comes to rest is due to ________.
1). Friction
2). Magnetic force
3). Electrostatic force
4). Muscular force
1. It is easier to carry two buckets of water in one hand each than to can only one in one hand because
2. Light houses are places with powerful lights to
3. The device which converts sound energy into electrical energy is called
4. ?When a charged particle entres a?uniform magnetic field its kinetic energy
5. What is the SI unit of Power?
6. The magnifying power of an astronomical telescope can be decreased by
7. The shape of a rain drop is spherical?due to -