In order for us to detect sound, the vibrations need to be transmitted through many different structures. Put the items in the correct order in which they allow us to detect sound.

Eardrum

Basilar membrane that detects pitch

Cochlea fluid

Bones of the inner ear

Hair cells that send the electrical impulse to the brain

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

propane is burned to provide the heat in many cooking grills. the chemical reaction for this process is shown in the equation below.

c3h8 + 5o2 ? 3 co2 + 4h2o + energy

what are the products in this chemical reaction?

3co2 + 4h2o + energy