Sometimes when a chemical change occurs of a substance will change

Ahowler monkey is the loudest land animal and, under some circumstances, can be heard up to a distance of 4.6 km. assume the acoustic output of a howler to be uniform in all directions and that the threshold of hearing is 1.0 × 10-12 w/m2. what is the acoustic power emitted by the howler

Which of the following is an example of units for speed

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?