through which of the following can sound NOT travel
a.gases
b.liquids
c.solids
d.vacuum
witch property of sound describes your perception of it ?
a.frequency
b.intensity
c.loudness
d.wave speed
which of the following best describes a high frequency sound
a.high pitch
b.low energy
c.low pitch
d.a and b
the unit of in tensity level of sound
a.ampere
b.deccibel
c.ohm
d.volt​