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 ...
The Story of Village Palampur from the NCERT textbook. This chapter explores the economic activities of a fictional village called Palampur highlighting farming and non-farming sectors. It introduces key concepts such as production factors of production and sustainability. To reinforce ...
The CBSE 2024-2025 curriculum for Class 9 Social Science introduces students to the NCERT textbook, starting with Chapter 1: The Story of Village Palampur. This chapter provides an overview of rural economies, focusing on farming and non-farming activities in an ...
The correct answer is (b) 1815 m. The distance is calculated using distance = speed × time. Given the speed of sound as 330 m/s and time as 5.5 s, the distance is 330 × 5.5 = 1815 m. Class ...
CBSE 2024-2025 | NCERT Social Science | Class 9th | Chapter 1: The Story of Village Palampur | MCQ Questions Chapter 1, The Story of Village Palampur, introduces students to the basic concepts of economics and rural development. It explores ...
The correct answer is (a) sound will be louder but pitch will not be different. Loudness depends on the amplitude of vibration, which increases when the key is struck harder. However, pitch depends on frequency, which remains unchanged as it ...