Home

The frequency of an ultrasonic wave is

A. the same as that of an audible sound

B. above the audible range

C. below the audible range

D. None of the above

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
  1. The asteroids belt lies between the orbits of
  2. Among the following the most suitable material for the core of an electro-magnet is
  3. The largest reserve of radioactive element which can be used in a nuclear reactor has been found in…
  4. At what temperature do the Fahrenheit and Kelvin scales give the same reading?
  5. Two tumblers stuck together can be separated by
  6. The ozone layer absorbs
  7. A piece of ice is Boating In water kept in a beaker. When all the ice melts the level of water will
  8. An electric kettle used for boiling hard water has a white scale deposited on its heating element. This…
  9. Frictional force acts in
  10. Which of the following is known as freon?
  11. Enriched uranium means
  12. The planet that has got a well-developed set of rings is
  13. A ship sailing from a river to the sea
  14. The velocity required to place a vehicle in orbit round the moon is _________ that required to place…
  15. We cannot see and without the aid of a telescope
  16. Primary colours are
  17. At what temperature do the Fahrenheit and Celsius scales give the same reading?
  18. A boy sitting in a train moving with a uniform velocity drops a coin outside. A man standing outside…
  19. When a particle in motion is acted upon by a force in a direction perpendicular to the direction of…
  20. Powder clings to the skin because of
  21. The phenomenon of spontaneous disintegration of certain heavy nuclei is termed
  22. The property of a fluid by which it resists relative motion within itself is known as
  23. A thermostat is a device used
  24. Mercury is used in thermometers because
  25. X-rays are
  26. The instrument used to determine the RD (Relative Density) of a liquid by the principle of floatation…
  27. The velocity of sound in air
  28. In compact porous soil, the rising of the water is due to
  29. Meteors
  30. The fact that two large ships travelling on close parallel courses in the same direction tend to move…