Question

Fill in the blanks.
i.
Sound waves cannot travel in a
ii.
The number of vibrations per second is called
iii. The number of vibrations is measured in units called
iv. A recurring disturbance or movement that transfers energy through matter
is called a
V. Most humans can hear sounds ranging between
and
hertz.
vi. Sound needs a
to travel through.
vii. Sound travels fastest through a
medium.
viii. Sound travels most slowly through a
medium.
ix. Bats use a property of sound called
to tell where they are
going.
X. A mouse can hear a sound up to
Hz.​

Answer 1

Answer:

what type of question is this...

Explanation:

soi long

Answer 2

Answer:

Sound waves cannot travel through(1) Solids(2) Liquids(3) Gases(4) Vacuum 1 answer

frequency: A measure of the number of vibrations per second. Hertz: The metric unit for frequency (1 Hertz (Hz) = 1 vibration per second).2 answer ,3 answer

wave is a repeating disturbance or movement that transfers energy through matter or space.4answer

Humans can detect sounds in a frequency range from about 20 Hz to 20 kHz.