Question

not
an
2 Write T for True and F for False.
a. Sound requires a medium for
its propagation.
b. The ringing of a bell inside an
evacuated room cannot be heard.
c. Sound travels faster than light.
d. SONAR uses ultrasonic sound waves
to detect objects.
e. The speed of the sound in liquid varies
with the intensity.
f. Ultrasonic sounds are sounds with
frequency less than 20 Hz.
g. Elephants can hear infrasonic sound.​

Answer 1

Answer:

All true

Explanation:

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Answer 2

A)true
B)false
C(false
D)true
E)true
F)false
G)true