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The rocket engine is motivated by jet propulsion which uses the famous

A. Kepler's Laws

B. Newtonian Third Law of Motion

C. Bernoulli's Principle

D. Law of Relativity

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  1. Sound waves in air are
  2. A transformer
  3. The solar wind is composed of
  4. A timer in a race is at the finish line. He should start his stop watch
  5. Thick brick walls are used in the construction or a cold storage because bricks
  6. The instrument used to determine the RD (Relative Density) of a liquid by the principle of floatation…
  7. The device for tracking and locating the position of a moving object in space is called
  8. The escape velocity of a satellite projected from the surface of the earth is independent of
  9. The tiniest of the stars belong to the group known as
  10. The radius of an atom is approximately
  11. When light travels from one medium to another there is a change in its
  12. The theory that the earth constituted the centre of the universe around which the sun and the planets…
  13. Ultrasonic waves are used
  14. The body of an electrical appliance is earthed in order that
  15. When a satellite la In a geostationary orbit the force keeping it in orbit Is
  16. Electron-volt is a unit of
  17. A workman was working on a rail track. A young boy at a distance holds his ear close to the railway…
  18. In a microphone
  19. Primary colours are
  20. For accurate scientific work, temperatures are often measured by
  21. No current will flow between two charged bodies if they have the same
  22. The study of astronomy include a
  23. A pressure gauge for fluids is called
  24. A boat loaded with rocks floats in the middle of a swimming pool. A man in the boat throws the rocks…
  25. A cup of hot coffee is placed on a metal table in a room. By which of the following methods does it…
  26. It is difficult to bon potatoes at the top or a mountain because
  27. Echoes are produced by
  28. The extremely luminous objects located at the centre of some distant galaxies and which are sources…
  29. The frequency of an ultrasonic wave is
  30. Which of the following is fissionable?