Exercise : Solution of Questions on page Number : 08 Answer : 1 The speed of light in vacuum is 299,792,458 m/s. Then time taken by light to cover a distance …
Exercise : Solution of Questions on page Number : 321 Answer: 1 No, in wave motion there is no actual transfer of matter but transfer of energy between the points …
Exercise : Solution of Questions on page Number : 270 Answer: 1 Density is defined as mass per unit volume. It tells how closely packed are the molecules inside an …
Exercise : Solution of Questions on page Number : 250 Answer: 7 The mean position of a particle executing simple harmonic motion is fixed, whereas its extreme position keeps on …
Exercise : Solution of Questions on page Number : 223 Answer: 1 A particle will be in equilibrium when the net force acting on it is equal to zero. Two …
Exercise : Solution of Questions on page Number : 192 Answer: 1 Yes, such motion is possible if the translation takes place along the axis of rotation. This type of …
Exercise : Solution of Questions on page Number : 156 Answer: 1 Yes, the centre of mass can be at a point outside the body. For example, the centre of …
Exercise : Solution of Questions on page Number : 130 Answer: 1 No. Work done in lifting the box increases the potential energy of the box. During lifting at every …
Exercise : Solution of Questions on page Number : 351 Answer: 1 No, we cannot hear the sound of stones. Sound is a mechanical wave and requires a medium to …
Exercise : Solution of Questions on page Number : 379 Answer: 1 White light is a composition of seven colours. These are violet, indigo, blue, green, yellow, orange and red, …