Awave is traveling through a medium. as it travels, it displaces particles of matter in the same direction as the wave is traveling. this type of wave is a longitudinal wave because the particles move parallel to the direction that the wave is traveling. transverse wave because of the way the particles are displaced as the wave passes through. longitudinal wave because it moves forward through a medium causing the particles to vibrate. transverse wave because it is not traveling in a vacuum and the particles are moving.

Beryl states that insulation with the smallest possible thermal conductivity is best to keep a house warm in winter, but worst for keeping a house cool in summer. sapphire insists the reverse is true: low thermal conductivity is good in the summer, but bad in the winter. which one, if either is correct? a. beryl, because low thermal conductivity results in low heat transfer. b. beryl, because low thermal conductivity results in high heat transfer. d. sapphire, because low thermal conductivity results in high heat transfer. e. neither, because low heat transfer is desirable both in summer and in winter.