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The colour of a star is an indication of its

A. distance from the earth

B. age

C. temperature

D. size

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  1. The function of a moderator in a nuclear reactor is
  2. The audible range of a normal human ear is frequencies ranging from
  3. Cosmic rays contain
  4. On the Kelvin scale, the melting point of ice is
  5. When an electric bulb breaks, there la an explosive sound. That is due to
  6. A photon is
  7. The mixing up of two gases as a result of random motion of molecules is called
  8. Pieces of camphor placed on water move about rapidly. This is because of
  9. The acoustical quality of a room depends on
  10. When the resistance of a circuit increases the current will
  11. A small bubble of air deep down in a lake rises up to the top of the lake. The volume of the bubble…
  12. The star nearest to the sun is
  13. Primary colours are
  14. The filament lamp is an example for
  15. Mercury does not stick to glass because
  16. A solar eclipse occurs when the earth, the sun and the moon are in a straight line, and
  17. In a freezer ice cubes will be formed more quickly in trays made of
  18. It is difficult to bon potatoes at the top or a mountain because
  19. X-rays were discovered by
  20. A bucket of water is hung from a spring balance. A piece of iron is suspended in the water without touching…
  21. One finds it more difficult to walk on ice than on a concrete road because
  22. We always see only one side of the moon because
  23. The red colour of the setting sun is due to
  24. Who first established the fact that the earth revolves round the sun?
  25. Solids have definite shapes. This is because
  26. A rod of brass la held in hand and rubbed with fur. The rod is found to have
  27. Metals are good conductors of heat because
  28. Rain drops acquire spherical shape due to
  29. The minimum velocity required by a satellite to escape earth's gravitational pull is
  30. When a bullet is fired from a gun