Q.1 Why is the average velocity of the molecules in a gas zero but the average of the square of velocities is not zero? Ans. The m...
Q.1 Why is the average velocity of the molecules in a gas zero but the average of the square of velocities is not zero? Ans. The m...
Q.1 What do you understand by linear magnification and angular magnification? Explain how a convex lens is used as a magnifier? Ans. Li...
Q.1 Under what conditions two or more sources of light behave as coherent sources? Ans. Two or more waves having a constant phase differ...
Q.1 What features do longitudinal waves have in common with transverse waves? Ans. Common features of longitudinal and transverse waves:...
Q.1 Name two characteristics of simple harmonic motion. Ans. a ∝ - x i) Acceleration is directly proportional to the displacement. ...
Q.1 Explain what do you understand by the term viscosity? Ans. Viscosity: “The property of fluids by which they resist their flow due t...
Q.1 Explain the difference between tangential velocity and the angular velocity. If one of these is given for a wheel of known radius, h...
Q.1 A person hold a bag of groceries while standing still, talking to a friend. A car is stationary with its engine running. From the s...
Q.1 What is the difference between uniform and variable velocity. From the explanation of variable velocity, define acceleration. Give...
Q.1 Define the terms (i) Unit vector, (ii) Position vector and (iii) Components of a vector. Ans. Unit vector: “A unit vector in a giv...