Chapter 12 Thermodynamics
Chapter 12 Thermodynamics QUESTIONS FROM TEXTBOOK Question 1 A geyser heats water flowing at the rate of 3.0 litres per minute from 2 7°C to 77°C. If the geyser operates on a gas burner, what is the rate of consumption of the fuel if its heat of combustion is 4.0 x 104 J/g? Answer: Volume of water […]
Chapter 11 Thermal Properties of matter
Chapter 11 Thermal Properties of matter QUESTIONS FROM TEXTBOOK Question 1. The triple points of neon and carbon dioxide are 24.57 K and 216.55 K respectively. Express these temperatures on the Celsius and Fahrenheit scales. Answer: The relation between kelvin scale and Celsius scale is TK – 273.15 =TC => TC=TK– 273.15 Question 2. Two absolute scales A […]
Chapter 10 Mechanical Properties of Fluids
Chapter 10 Mechanical Properties of Fluids QUESTIONS FROM TEXTBOOK Question 1. Explain why (a) The blood pressure in humans is greater at the feet than at the brain. (b) Atmospheric pressure at a height of about 6 km decreases to nearly half of its value at the sea level, though the height of the atmosphere […]
Chapter 9 Mechanical Properties of Solids
Chapter 9 Mechanical Properties of Solids QUESTIONS FROM TEXTBOOK Question 1. A steel wire of length 4.7 m and cross-sectional area 3.0 x 10-5 m2 stretches by the same amount as a copper wire of length 3.5 m and cross-sectional area of 4.0 x 10-5 m2 under a given load. What is the ratio of the Young’s modulus of […]
Chapter 8 Gravitation
Chapter 8 Gravitation QUESTIONS FROM TEXTBOOK Question 1. Answer the following: (a) You can shield a charge from electrical forces by putting it inside a hollow conductor. Can you shield a body from the gravitational influence of nearby matter by putting it inside a hollow sphere or by some other means? (b) An astronaut inside […]
Chapter 7 System of Particles and Rotational Motion
Chapter 7 System of Particles and Rotational Motion QUESTIONS FROM TEXTBOOK Question 1. Give the location of the centre of mass of a (i) sphere, (ii) cylinder, (iii) ring, and (iv) cube, each of uniform mass density. Does the centre of mass of a body necessarily lie inside the body? Answer: In all the four cases, […]
Chapter 6 Work Energy and Power
Chapter 6 Work Energy and Power QUESTIONS FROM TEXTBOOK Question 1. The sign of work done by a force on a body is important to understand. State carefully if the following quantities are positive or negative: (a) Work done by a man in lifting a bucket out of a well by means of a rope […]
Chapter 5 Laws of motion
Chapter 5 Laws of motion QUESTIONS FROM TEXTBOOK Question 1. Give the magnitude and direction of the net force acting on (a) a drop of rain falling down with a constant speed, (b) a cork of mass 10 g floating on water, (c) a kite skilfully held stationary in the sky, (d) a car moving […]
Chapter 4 Motion in a plane
Chapter 4 Motion in a plane QUESTIONS FROM TEXTBOOK Question 1. State, for each of the following physical quantities, if it is a scalar or a vector: volume, mass, speed, acceleration, density, number of moles, velocity, angular frequency, displacement, angular velocity. Answer: Scalars: Volume, mass, speed, density, number of moles, angular frequency. Vectors: Acceleration, velocity, displacement, angular […]
Chapter 3 Motion in a Straight Line
Chapter 3 Motion in a Straight Line Question 1. In which of the following examples of motion, can the body be considered approximately a point object. (a) A railway carriage moving without jerks between two stations. (b) A monkey sitting on top of a man cycling smoothly on a circular track. (c) A spinning cricket […]