For each of the following choose the correct unit (milligrams,grams,or kilograms) to make each sentence reasonable: a. A dime has a mass of 2 . b. The recipe said to add 4 of salt. c. One strand of hair has a mass of 2.

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