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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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See lesshttps://www.tiwariacademy.com/ncert-solutions/class-11/physics/chapter-13/
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/
See lessOn the basis of generalised monthly atmospheric conditions, the year is divided into seasons. Which of the following is not included in it?
Correct answer: (d) Spring season Explanation: In India, the year is divided into four main seasons based on generalized monthly atmospheric conditions: Winter Season (December to February) Summer Season (March to May) Rainy/Monsoon Season (June to September) Retreating Monsoon/Post-Monsoon Season (Read more
Correct answer: (d) Spring season
Explanation: In India, the year is divided into four main seasons based on generalized monthly atmospheric conditions: Winter Season (December to February) Summer Season (March to May) Rainy/Monsoon Season (June to September) Retreating Monsoon/Post-Monsoon Season (October to November) However, Spring Season is not officially recognized as a separate climatic season in the Indian Meteorological Department (IMD) classification. This question related to Chapter 4 Social Science Class 9th NCERT. From the Chapter 4 Climate. Give answer according to your understanding.
For more please visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/social-science/