Phy101 Week 9 KC (Ch 20) Latest Exam Questions and Answers with Verified Solutions | Latest Updated 2026

Phy101 Week 9 KC (Ch 20) Latest Exam
Questions and Answers with Verified
Solutions | Latest Updated 2026



Human hearing is best in
a.neither of these
1 b.infrasonic sound.
c.ultrasonic sound.
d.both of these


One reason for the higher pitch of your voice after you've inhaled some
sound travels helium is that
2 a.faster in helium than in air. a longer wavelength.
b.slower in helium than in air.
c.the same speed in helium but
with


The speed of sound in air is for
greatest
a.same for all frequencies.
4
b.low frequencies.
c.high frequencies


Human hearing is best in a.neither of these
a.neither of these
b.infrasonic sound.
c.ultrasonic sound.
d.both of these

, Sound travel fastest in e.ice.
a.water vapor
.b.all of the above
c.steam.
d.water.
e.ice.


A base fiddle is louder than a harp d.sounding board.
because of its
a.none of the above
b.lower pitch.
c.thicker strings
.d.sounding board.
e.all of the above


Reflection of sound can occur in d.both of these
a.air.
b.neither of these
c.water.
d.both of these


The speed of sound in air is a.same for all frequencies.
greatest
for
a.same for all frequencies.
b.low frequencies.
c.high frequencies