Which of the following liquids has the least density
1). Fresh water
2). Salt water
3). Petrol
4). Mercury
1. Metals are good conductor of heat?than insulator because
2. Which of the following is a vector quantity?
4. What is the unit of the physical quantity 'Young's modulus'?
5. Which of the following principle is used to produce low temperatures
6. What changes will happen to a bowl of ice and water kept at exactly zero degree Celsius
7. Which of the following is a primary consumer?
9. Ball bearings are used in cycles, scooters etc to
10. Mica is used in electrical appliances such as electric iron because mica is