The phenomenon of spontaneous disintegration of certain heavy nuclei is termed

A. radioactivity

B. fission

C. fusion

D. implosion

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  1. The transistor was invented by
  2. Air pressure is usually highest when the air is
  3. One finds it more difficult to walk on ice than on a concrete road because
  4. The red colour of the setting sun is due to
  5. Which of the following pairs is not correct?
  6. The heat produced in a conductor due to the passage of a current through it is proportional to
  7. The phenomenon of spontaneous disintegration of certain heavy nuclei is termed
  8. Stars twinkle because of
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  14. Lightning is produced when
  15. When a whistling engine approaches a person standing on the platform, the frequency or the note
  16. A bucket of water is hung from a spring balance. A piece of iron is suspended in the water without touching…
  17. Sound waves
  18. The attraction between similar molecules is called
  19. A person does not sink in the Dead Sea because
  20. A series of east moving still pictures can be made to appear as a moving picture because the eye
  21. Rain drops acquire spherical shape due to
  22. The velocity of sound in a medium is
  23. Who first established the fact that the earth revolves round the sun?
  24. The spectrum of white light can be studied by
  25. Water has maximum density at
  26. The instrument used to measure atmospheric pressure is
  27. The extremely luminous objects located at the centre of some distant galaxies and which are sources…
  28. The mirage is a phenomenon
  29. The method used to separate aluminium from a alumina is
  30. The radius of curvature of a spherical mirror is