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Sound waves in air are

A. transverse

B. longitudinal

C. transverse and longitudinal

D. neither transverse nor longitudinal

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  1. In a freezer ice cubes will be formed more quickly in trays made of
  2. When light travels from one medium to another there is a change in its
  3. When we tighten the string of a sitar or tanpura its pitch
  4. A pair of stars that revolve round each other is
  5. Which metal is used in storage batteries?
  6. A boy sitting in a train moving with a uniform velocity drops a coin outside. A man standing outside…
  7. The tiniest of the stars belong to the group known as
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  9. At what temperature do the Fahrenheit and Kelvin scales give the same reading?
  10. We always see only one side of the moon because
  11. When a body is immersed in a fluid the force of buoyancy of the fluid on the body depends on
  12. The motion .of the pendulum of a wall clock is an example of
  13. The ballistic missile, Agni 11, tested by India has a maximum range of
  14. A cyclist leans inwards when he is negotiating a curve 10 that
  15. Which of the following rays has the highest penetrative power?
  16. The number of electrons in the outer orbits of a nucleus gives
  17. The speed at which light travels in vacuum is
  18. An astronomical unit of distance is
  19. Water has maximum density at
  20. At what temperature do the Fahrenheit and Celsius scales give the same reading?
  21. The solar wind is composed of
  22. A radio set that uses valves does not start operating immediately when it is switched on whereas a set…
  23. The Milky Way is
  24. Credit for starting Space Science Research in India goes to
  25. An electric fan converts
  26. Mercury is used in thermometers because
  27. For detecting and, testing of small electric charges we use
  28. Echoes are produced by
  29. Water kept in an earthen pot is less cool on rainy days than in summer because during the rainy days
  30. When an electric bulb breaks, there la an explosive sound. That is due to