Question

primary waves are secondary waves give reasons​

Answer 1

Answer:

Secondary waves Following an earthquake event, S-waves arrive at seismograph stations after the faster-moving P-waves and displace the ground perpendicular to the direction of propagation. ... Shear waves can't travel through any liquid medium, so the absence of S-wave in earth's outer core suggests a liquid state.

Explanation:

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Answer 2

Explanation:

Both Body Waves and Surfaces waves comprise an earthquake, but the body waves arrive first. Primary are first, And Secondary are, well, second of course. P Waves are compressional which means they move through (compress) a solid or liquid by pushing or pulling similar to the way sound travels through the air.