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The Doppler effect causes a change in
In simple terms, it means the change in frequency and wavelength of a wave because of the relative motion of the source with respect to the observer. The frequency observed f' can be expressed by this equation: f' = f(v ± vₒ)/(v ∓ vₛ) where: - f' is the observed frequency, - f is the source frequencRead more
In simple terms, it means the change in frequency and wavelength of a wave because of the relative motion of the source with respect to the observer. The frequency observed f’ can be expressed by this equation:
f’ = f(v ± vₒ)/(v ∓ vₛ)
where:
– f’ is the observed frequency,
– f is the source frequency,
– v is a constant speed of propagation of the wave,
– vₒ is the velocity of the observer,
– vₛ is the velocity of the source.
Once again, though, since wave speed remains constant in a given medium, firmly speaking there must also be a change in wavelength λ’ for a change in frequency f’ to occur regarding the wave equation:
v = fλ
So the Doppler effect is that the frequency and wave have been destroyed, with speed being uniform.
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Which of the following will remain unchanged when a sound wave enters from air in water?
(c) When a sound wave passes from air to water, the speed of sound, wavelength and amplitude change. But frequency of sound wave does not change. Thus, frequency of a wave is its most inherent property which does not change. https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-11/
(c) When a sound wave passes from air to water, the speed of sound, wavelength and amplitude change. But frequency of sound wave does not change. Thus, frequency of a wave is its most inherent property which does not change.
https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-11/
See lessWhich of the following statements is correct about the Tropic of Cancer?
The correct answer is: (b) The Tropic of Cancer passes through the middle of the country from Rann of Kutch in the west to Mizoram in the east. Explanation: The Tropic of Cancer (23.5°N latitude) is an imaginary line that passes through India, dividing it into two almost equal halves. It enters IndiRead more
The correct answer is: (b) The Tropic of Cancer passes through the middle of the country from Rann of Kutch in the west to Mizoram in the east.
Explanation: The Tropic of Cancer (23.5°N latitude) is an imaginary line that passes through India, dividing it into two almost equal halves. It enters India in Gujarat (Rann of Kutch) and exits in Mizoram, covering 8 states:
Gujarat Rajasthan Madhya Pradesh Chhattisgarh Jharkhand West Bengal Tripura Mizoram
This question related to Chapter 4 Social Science Class 9th NCERT. From the Chapter 4 Climate. Give answer according to your understanding.
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Two waves of slightly different frequencies interfere to produce
Beats are produced when two waves of slightly different frequencies interfere with one another. This results in a sound that alternates between loud and soft at a certain frequency known as the beat frequency. This is given by, f_beats = |f₁ - f₂| where - f_beats is the beat frequency - f₁ and f₂ arRead more
Beats are produced when two waves of slightly different frequencies interfere with one another. This results in a sound that alternates between loud and soft at a certain frequency known as the beat frequency. This is given by,
f_beats = |f₁ – f₂|
where
– f_beats is the beat frequency
– f₁ and f₂ are the frequencies of the two interfering waves.
This would commonly be observed in sound waves by experiencing periodic variation in amplitude, which leads to a pulsating sound.
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Which crop is not a fodder crop?
(a) It is a pulse crop. https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-12/
(a) It is a pulse crop.
https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-12/
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