Advertisements
Advertisements
Question
Which of the following statement best describes frequency?
Options
the maximum disturbance caused by a wave
the number of complete vibrations per second
the distance between one crest of a wave and the next one
the distance travelled by a wave per second
Advertisements
Solution
Frequency is defined as number of complete vibrations per second.
(b) Number of complete vibrations per second.
APPEARS IN
RELATED QUESTIONS
An echo returned in 3 s. What is the distance of the reflecting surface from the source, given that the speed of sound is 342 m s−1?
When a sound is reflected from a distant object, an echo is produced. Let the distance between the reflecting surface and the source of sound production remains the same. Do you hear echo sound on a hotter day?
A man is standing at a distance of 12 m from a cliff. Will he be able to hear a clear echo of his sound? Give a reason for your answer.
Name three devices which work on the reflection of sound.
What is the other name of a loud-hailer ?
What is an echo ? How is echo formed ?
Answer the following question in your own words.
What is an echo?
What are the medical applications of echo?
______ is an image obtained by the use of reflected ultrasonic waves.
Numerical problems:
An echo returned in 3s. What is the distance of the reflecting surface from the source given that the speed of sound is 330 ms-1?
