Aclass activity to study human cheek cells, a student takes a cotton swab and gently scrapes the inside of her mouth. in order to view the cheek cells using a compound microscope, what tool will the student need ? a. glass slide b. petri dish c. pipette d. scalpel

the correct option is option d

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

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.