Across
- 2. The radiation with highest energy is
- 3. Which of these four elements are essential for the construction of nuclear reactors?
- 5. Which of the following cannot pass through vacuum?
- 7. joule is the unit of
- 8. The smallest planet in the solar system is
- 9. kilowatt hour is a unit of
- 10. who discovered that the earth moves round the Sun?
Down
- 1. The instrument used to test the purify of milk is
- 4. the unit of work and energy is
- 6. The power of a lens is measured in