Answer:
C
Explanation:
frequency = 1 / period
so
frequency = 0.25
0.25 = 1 / period
1 / 0.25 = period
4 s = period
it is not 4 Hz because period is the time taken
so the answer is C
hope this helps ,please mark it
Answer:
erm they all should have same numbers of protons
Audio frequency
An audio frequency or audible frequency is a periodic vibration whose frequency is in the band audible to the average human, the human hearing range.
P R E S S U R E
R
E
S
S
U
R
E R U S S E R P
This is the answer :)))))
