Frank ICSE Solutions for Class 9 Physics – Sound: Range of HearingPAGE NO: 284 Solution 1: The frequency of sound is defined as the number of vibrations produced by the sound producing object per second.Solution 2: S.I unit of frequency is hertz. Soluti…

Frank ICSE Solutions for Class 9 Physics – Sound: Production and Propagation of SoundPAGE NO: 278 Solution 1: Yes, Sound is form of energy.Solution 2: Sound is produced by the vibrating objects. Solution 3: No, sound cannot travel through vacuum.Solutio…

Frank ICSE Solutions for Class 9 Physics – LightPAGE NO: 261 Solution 1: Convex mirror has a wider field of view.Solution 2: Convex mirror always produces an erect image of the object. Solution 3: Convex mirror is used in vehicles to see the traffic on r…

Frank ICSE Solutions for Class 9 Physics – Light: Spherical MirrorsPAGE NO: 258 Solution 1: A spherical mirror is a part of a hollow glass sphere silvered on one side.Solution 2: Solution 3: Focal length = 1/2 of radius of curvature = 1/2 x 30 = 15cm.So…

Frank ICSE Solutions for Class 9 Physics – Light: Reflection of LightPAGE NO: 245 Solution 1: Light may be defined as the radiant energy which produces in us the sensation of sight. Light itself is invisible but makes other objects visible.Solution 2: Ye…

Frank ICSE Solutions for Class 9 Physics – Heat: Transmission of HeatPAGE NO: 226 Solution 1: Conduction, convection and radiation are three modes of transfer of heat.Solution 2: The process of conduction involves the transmission of heat from the hot e…

Frank ICSE Solutions for Class 9 Physics – Heat: ThermometryPAGE NO: 209 Solution 1: Temperature is the quantity that tells about the thermal state of a body i.e. the degree of hotness or coldness of a body.Solution 2: Thermometer is used for measuring t…

Frank ICSE Solutions for Class 9 Physics – Heat: Thermal ExpansionPAGE NO: 202 Solution 1:Coefficient of Linear expansion is equal to the change in length of a rod of length 1m when its temperature rises by 1°c.Coefficient of superficial expansion is equ…

Frank ICSE Solutions for Class 9 Physics – HeatPAGE NO: 191 Solution 1: Heat is defined as a form of energy which flows from one point to another on account of temperature difference.Solution 2: Yes, heat is a form of energy Solution 3: Joule is the SI u…

Frank ICSE Solutions for Class 9 Physics – FluidsPAGE NO: 157 Solution 1: The thrust on the unit surface is known as pressure. The SI unit of pressure is Nm-2.Solution 2: Pressure is given by P = h Xp Xg. Where h is height of liquid column, p is density…