PLEASE HELP! Sonar is used to inspect pipelines and bridge foundations. In this scenario, sonar takes advantage of the fact that

A. sound waves can reflect.

B. sound waves can diffract.

C. sound waves can spread out.

D. sound waves can refract.

There is no science subject.

Gymnast always perform on padded mats. how does the mats protect the gymnast

What occurs when a cell engulfs large food particals

You are attempting to recrystallize a crude product mixture. you add the appropriate amount of hot solvent and are allowing the solution to slowly cool to room temperature. however, at room temperature no crystals have appeared, which of the following methods should be used to induce crystallization? choose all correct answers. a) place the flask in an ice bath. b) swirl the contents of the flask. c) add a small seed crystal of the desired product. d) scratch the inside of the glassware using a stir rod. it can be multiple choices