Why the Earth is having its own atmosphere ?
1). Winds
2). Clouds
3). Gravity
4). Rotation of the Earth
1. While catching a ball a player pulls down his hands to lower the
2. The capacity of a water heater is measured in
3. What is the principle of a ''Life Jacket"?
4. In the atmosphere ultraviolet rays are absorbed by
6. In a diesel engine the high temperature needed to ignite the fuel is achieved by
7. Which of the following are used for accurately measuring very small time intervals ?
8. What does the slope of a velocity time graph represent?