Abalanced chemical reaction obeys the law of

Awoman stands a distance d from a loud motor that emits sound uniformly in all directions. the sound intensity at her position is an uncomfortable 2.0×10-3 w/m2. at a distance 2.6 times as far from the motor, what are (a) the sound intensity and (b) the sound intensity level relative to the threshold of hearing?

Ajoint produces movement when its angle decreases. which type of movement is it?

Bonds within one water molecule are examples of