The quality of sound produced by an?instrument depends on the
1). frequency
2). intensity?
3). ?number of overtones
4). none of these
1. Which one of the following is not a property of electromagnetic waves?
2. The minimum number of forces to keep a particle in equilibrium is
3. Forged documents are detected by
4. The energy stored in a watch spring is
5. Atmospheric pressure exerted on earth is due to
6. Wollen clothes keep the body warm because
7. Which of the following series is true about energy flow in an ecosystem?
9. Ice cubes are added to a glass of pure water and a glass of pure alcohol. The ice would be