Is a sweet potato hydrophillic or hydrophobic

The sweet potato cells have a hydrophilic surface (because of the phospholipids on their cell membranes). But I don't think you can refer an object as hydrophilic or hydrophobic because an object can neither attract or repel water or oil, these stuffs usually happen in the molecular level:)

answer; ///i do believe the answer is (virus);

when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave