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प्रश्न
Consider the statement given below and choose the correct option.
Assertion: Two persons on the surface of the moon cannot talk to each other.
Reason: There is no atmosphere on the moon.
विकल्प
Both assertion and reason are true and the reason is the correct explanation of assertion.
Both assertion and reason are true but reason is not the correct explanation of assertion.
Assertion is true but reason is false.
Assertion is false but reason is true.
Both Assertion and reason are false.
उत्तर
Both assertion and reason are true and reason is the correct explanation of assertion.
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संबंधित प्रश्न
Give scientific reasons:
Astronauts on the moon can not hear each other directly.
Loudness is proportional to the square of the ______.
When we change feeble sound to loud sound we increase its
Represent graphically by two separate diagrams in each case
Two sound waves having the same amplitude but different frequencies?
An object is vibrating at 50 Hz. What is its time period?
A sound of a single frequency is called ______ and a collection of tones is called ______.
Match the following:
| 1. | Wave | a. | Unwanted sound |
| 2. | Sound | b. | Successive reflections |
| 3. | Noise | c. | Movement of disturbance |
| 4. | Thunder | d. | Mechanical wave |
Pitch is a general term for the distinguishable characteristic of a tone.
Define:
Wavelength
Numerical problems:
The velocity of sound in air is 344 ms-1 What is the range of wavelength of audible sound?
