The earth's nearest neighbour in space is

A. the Sun

B. the Moon

C. the Venus

D. the Mars

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  1. Mica is used in an electric iron because it is a
  2. When the disturbed electrons of an exited atom transfer back into lower energy levels they emit energy…
  3. When light passes from air to glass, its velocity in glass
  4. Drinks kept in a vacuum flask remain hot or cold as the case may be for a long time because
  5. Lightning is produced when
  6. When a body is immersed in a fluid the force of buoyancy of the fluid on the body depends on
  7. A star contains
  8. The loudness of a sound is determined by
  9. Which of the following pairs is not correct?
  10. Rays similar to X-rays but of smaller wave length that are given off by radioactive substances are
  11. It is easier to climb down a staircase than climb up because in climbing down
  12. Who discovered that the Cree Call acceleration Is the same for any object at a given place?
  13. Mercury is used in thermometers because
  14. A temperature below absolute zero for an ideal gas
  15. The Cact that the compass needle does not point true north was observed first by
  16. Commonly used safety fuse wire is made of
  17. A bolometer is used to measure
  18. If a body is taken from the earth to the moon
  19. A bar magnet tied in the middle with a thread is suspended at the South Pole of the earth. The magnet…
  20. The image formed by a plane mirror is
  21. The device used to record the sound is
  22. The body of an electrical appliance is earthed in order that
  23. Mercury does not stick to glass because
  24. Rain drops acquire spherical shape due to
  25. In a hydraulic pressure
  26. The light from the star nearest to the sun reaches the earth in
  27. Dioptre is the unit of power of
  28. The shadow below a tree has bright spots in it because
  29. The brightest planet in the Solar System is
  30. A spherical mirror is