Acoustics is a property or

A. Physics

B. Chemistry

C. Biology

D. Economic

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  1. A spherical mirror is
  2. The scientist who first sent electromagnetic waves to distant places was
  3. A capillary tube is partially dipped vertically in a vessel containing water. Due to capillarity water…
  4. Which of the following can produce electricity?
  5. The spectrum of white light can be studied by
  6. In the case of bodies falling under gravity which of the following remains constant at a given place?
  7. When a body is projected upwards
  8. Nichrome is used in electric heaters and irons because
  9. Sound waves
  10. If the speed of the rotation of the earth increases the weight of a body
  11. A boat loaded with rocks floats in the middle of a swimming pool. A man in the boat throws the rocks…
  12. Frictional force acts in
  13. On the Kelvin scale, the melting point of ice is
  14. The instrument used to measure atmospheric pressure is
  15. Resistance is measured in
  16. We see the sun before it actually rises on the horizon. This is due to
  17. The ringing of an electric bell in an enclosed evacuated glass bell jar is not heard outside because
  18. When a body is immersed in a fluid the force of buoyancy of the fluid on the body depends on
  19. Enriched uranium means
  20. The sun continuously produces an enormous amount of energy. This la due to
  21. The colour of the light which travels through glass with minimum speed is
  22. Photocells are used
  23. A lactometer la used to
  24. Cosmic rays are
  25. Expansion of a rod when heated
  26. Red Light is used as a dancer signal because
  27. During thunder storm you are travelling in a car. To protect yourself from the lightning you will have…
  28. It is difficult to bon potatoes at the top or a mountain because
  29. The cover of a solar cooker is made of glass because
  30. In a concert hall reverberation is controlled by