Physics

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