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With reference to the interior of the earth consider the following statements. 1] The P-waves are similar to sound waves. They can travel through only solid materials. 2] The mean thickness of continental crust is around 30 km. 3] The surface waves are the last to report on seismograph. Which of the statements given above is / are correct?

With reference to the interior of the earth consider the following statements. 1] The P-waves are similar to sound waves. They can travel through only solid materials. 2] The mean thickness of continental crust is around 30 km. 3] The surface waves are the last to report on seismograph. Which of the statements given above is / are correct? Correct Answer 2 and 3 only

  • Only the statements 2 and 3 are correct.
  • P-waves are a type of seismic waves and they travel faster than other seismic waves. These may be transmitted through all mediums be it solid, liquid or gas.
  • Sound waves are vibrations in the air and require a medium to travel. These can be both longitudinal and transverse waves. In a solid medium, these can be either transverse or longitudinal, while in the air and liquid medium, these are essentially longitudinal.

Related Questions

With reference to the interior of the earth consider the following statements. 1] All natural earthquakes take place in the lithosphere. 2] The lithosphere refers to the portion of depth up to 200 km from the surface of the earth. 3] Earthquake waves are basically of four types — body waves, surface waves, rolling waves and shock waves. Which of the statements given above is / are correct?
Which of the following statements is/are correct with regard to earthquake waves? 1) P waves can travel through solid, liquid and gaseous materials. 2) S waves can travel only through liquid material. 3) Velocity of P waves increases at it enters from denser to rarer medium. Select the correct answer using the code given below.
Which of the following statements are not true for sound ? (a) Sound waves are transverse waves. (b) Audible sound waves have frequency range of 20 kHz and above. (c) Sound waves require medium for propagation. (d) Non-periodic sound waves are termed as ‘Noise’. 
Consider the following statement with reference to Earth's crust. 1. The continental crust is formed from Basaltic rocks. 2. The ocean floors are formed from Granitic rocks. 3. It is the outer thin layer with a thickness of up to 200 km. Which of the following statements given above is/are not correct?
Which of the following statements is/are correct?   A) Sound waves are transverse waves. B) Audible sound waves have a frequency range of 20 kHz and above. C) Sound waves required a medium for propagation. D) Non-periodic sound waves are term as noise.
You are given a question and two statements. Idientify which of the statements is/are sufficient to answer the question. Question: In a city, some people travel to work by bus, some people travel to work by train, some people travel to work by both bus and train, and some travel to work neither by bus, nor by train. The number of people who travel to work by both bus and train is how much less than the number of people who travel to work by neither? Statements: (1) In the city, there are 384 people who travel to work by bus. (2) In the city, there are 672 people who travel to work by train,
With reference to the interior of the earth consider the following statements. 1] Body waves are generated due to the release of energy at the focus. 2] Denser the material, the lower is the velocity of the Earthquake waves. 3] There are two types of body waves. They are called P and S-waves. Which of the statements given above is / are correct?
In the following question, the 1st and the last part of the sentence/passage are numbered 1 and 6. The rest of the sentence/ passage is split into four parts and named P, Q, R and S. These four parts are not given in their proper order. Read the sentence/passage and find out which of the four combinations is correct. 1. Earthquakes are the shaking and moving of the ground when energy is released in waves.   P. These waves are similar to ocean waves, which move through water. Q. These waves are called seismic waves.  R. Seismic waves, however, move through the ground. S. Earthquakes can also be caused by other natural events, such as landslides and volcanoes.  6. Manmade earthquakes happen because of nuclear testing and mining explosions.
In the following question, sentences of a paragraph have been jumbled and labelled as A, B, C and D. You are required to rearrange the jumbled sentences of the paragraph and mark your response accordingly by selecting the correct option. A: As the source continues to vibrate the medium, the vibrations propagate away from the source at the speed of sound, thus forming the sound wave. B: The sound source creates vibrations in the surrounding medium.  C: The sound waves are generated by a sound source, such as the vibrating diaphragm of a stereo speaker. D: Sound can propagate through a medium such as air, water, and solids as longitudinal waves and also as a transverse wave in solids.
Which of the following are true regarding the crust of the earth?
I. It is the outer thin layer with a total thickness of about 100 km
II. It forms around 0.5% of the earth's volume
III. The outer covering of the crust is of sedimentary material
IV. The lower layer of the crust consists of basaltic and ultra-basic rocks