Question

1..Explain how defects in a metal block can be detected using ultrasound.
-2.. Explain how the human ear works.​

Answer 1

Answer:

Answer: Ultrasounds can be used to detect cracks and flaws in metal blocks. ... Ultrasonic waves are allowed to pass through the metallic block and detectors are used to detect the transmitted waves. If there is even a small defect, the ultrasound gets reflected back indicating the presence of the flaw or defect.

2.The sound waves are gathered by the outer ear and sent down the ear canal to the eardrum. The sound waves cause the eardrum to vibrate, which sets the three tiny bones in the middle ear into motion. The motion of the bones causes the fluid in the inner ear or cochlea to move.

Answer 2

Answer:

Hey mate!!!!here is ur answer