In which of the following cases kinetic energy is being used in performing work ?
1). Paddling the bicycle to cover a distance
2). Driving a car to cover a distance
3). Wind mill grinding wheat grain
4). Rowing a boat in the lake
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1. Which one is the unit of surface tension of a liquid
2. Which colour has the highest energy?
3. At hill stations, the boiling point of water will be
4. Which of the following is used for regulated electric supply
5. Which of the following is used to split white light into different colours ?
6. The unit of measurement of noise is
7. The spring balance works on the principle of ________ .