The correct answer is (b) 1.4 m. The wavelength (λ) is calculated using the formula: λ = v/f where v = 350 m/s (velocity of sound) and f = 250 Hz (frequency). λ = 350/250 = 1.4m. Class 9th Science ...
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The correct answer is (c) Frequency. When a sound wave moves from air to water, its speed and wavelength change due to the difference in medium density. However, frequency remains unchanged because it depends only on the source of the ...
The correct answer is (c) 200 Hz. The frequency (f) is given by the formula: F = 1/T where T = 0.005 s. F = 1/0.005 = 200 Hz. Class 9th Science NCERT MCQ Questions NCERT Books MCQ Questions Session ...
Class 9 CBSE 2024-2025 students studying NCERT Social Science will begin their journey with Chapter 1: The Story of Village Palampur. This chapter offers a detailed insight into the economic life of a rural village highlighting farming and non-farming activities. ...
The Story of Village Palampur is the first chapter in the NCERT Social Science textbook for Class 9 CBSE 2024-2025. This chapter provides an in-depth look at the economic activities in a rural Indian village focusing on farming and non-farming ...