The correct answer is Metal.
Sound waves are vibrations which need medium to propagate. Higher the density of medium, the sound travels fastest. Sound travels fastest in solid than liquid and gas. Therefore, in this question sound will travel faster in metal because metal has higher density than air and water and it will not travel in vacuum as sound needs medium to travel.
Air pressure (inside the lungs) is lowest when lung volume is highest, so the answer is B. when you breathe in your lungs expand, which makes the air molecules spread out, therefore the pressure is lower.
Answer:
D
Explanation:
Asexual reproduction (requiring one parent) forms exact copies of the parent cell. The type of cell division that produces exact copies is mitosis. Therefore the answer is D.
Is this like on a test or like homeowork?
