speech + hearing sci exam 1

pressure

-quantity constituted by size of area over which force is applied
-p = F/A
-unit: N/m² = pascal (Pa)
-cgs unit: dynes/cm²

work

-occurs when force applied to body results in its displacement
-W = Fx
-mks unit: joule (J)
- -amount of work that occurs when 1 N of force affects 1 meter of displacement
-cgs unit: erg (dyne x m)

potential energy

capability of body at rest to do work

kinetic energy

capability of body in motion to do work

power

-rate at which work is done
-P=W/t
-P=Fv
-unit: watt (W) (same in cgs)

intensity

-develops when power is dist over area
-I=P/A
-mks unit: W/m²
-cgs unit: W/cm²

inverse square law

-intensity decreases w increasing distance from sound source
-amt of intensity drops by 1 over square of change in distance