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Which instrument is used to measure sound under water ?

  • Hygrometer
  • Hygroscope
  • Hypsometer
  • Hydrophone

Answer: Option D

Explanation:

Hygrometer - is used to measure level of humidity,

Hygroscope - shows the changes in atmospheric humidity,

Hypsometer - is used to determine the boiling points of liquids.

Similar Questions :

1. Siphon will fail to work if

  • both its limbs are of unequal length
  • the temperature of the liquids in the two vessels are the same
  • the level of the liquid in the two vessels are at the same height
  • the densities of the liquid in the two vessels are equal

Answer: Option C

2. Which instrument is used to measure changes in volume of substances ?

  • Dyanamo
  • Dilatometer
  • Cyclotron
  • Electroscope

Answer: Option B

Explanation:

Dyanamo - is used to convert mechanical energy into electrical energy,

Cyclotron - is a charged particle accelerator which can accelerate charged particles to high energies,

Electroscope - is used to detect the presence of an electric charge.

3. What is escape velocity ?

  • Escape velocity is the maximum velocity with which a body should be projected from the surface of earth so it do not go beyond gravitational field of earth.
  • Escape velocity is the minimum velocity with which a body should be projected from the surface of earth so it do not go beyond gravitational field of earth.
  • Escape velocity is the minimum velocity with which a body should be projected from the surface of earth so as it goes out of gravitational field of earth and never return to earth.
  • Escape velocity is the maximum velocity with which a body should be projected from the surface of earth so as it goes out of gravitational field of earth and never return to earth.

Answer: Option C

4. Lognitudinal waves and Transverse waves are types of ?

  • Mechanical waves
  • Non-Mechanical waves
  • Both of above
  • None of Above

Answer: Option A

5. Orbital speed of a satellite is dependent of its mass.

  • True
  • False

Answer: Option B

Explanation:

Orbital speed of a satellite is independent of its mass.

Read more from - Physics Questions Answers
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