Triangles Can be Solved Using: 1  Pythagoras's Theorem. 2  Sine Rule. 3  Cosine Rule. 4  Angles all add up to 180 degrees.
Report Abuse. sound travels fastest in solid substances. as in solids, the medium is denser and it aids the propogation of sound. sound will not travel in vaccum as they will not propogate if no material medium is present. in air it travels with the speed of 350 m/s which is less than the speed of sound in solids.
Sound travels fastest in solids because the constituent particles (atoms/molecues/ions) are most closely/tightly packed. Sound is a longitudinal wave, which means that sound waves travel through the vibrations of individual particles of matter (compressions and rarefactions) which are along the direction on propogation. Only the disturbance is transmitted forward, without requiring the particles to actually move themselves.