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QUANTITY OF HEAT FORM THREE QUANTITY OF HEAT Heat is a form of energy that flows from one body to another due to temperature differences between them. Heat capacity Heat capacity is defined as the quantity of heat required to raise…

THE GAS LAWS Pressure law This law states that “the pressure of a fixed mass of a gas is directly proportional to the absolute temperature if the volume is kept constant”. The comparison between Kelvin scale and degrees Celsius is…

THIN LENSES FORM FOUR THIN LENSES. A lens is conventionally defined as a piece of glass which is used to focus or change the direction of a beam of light passing through it. They are mainly made of glass or plastic. Lens are used in…

UNIFORM CIRCULAR MOTION Introduction Circular motion is the motion of bodies travelling in circular paths. Uniform circular motion occurs when the speed of a body moving in a circular path is constant. This can be defined as motion of…

FLOATING AND SINKING FLOATING AND SINKING,Any object in a liquid whether floating or submerged experiences an upward force from the liquid; the force is known as upthrust force. Upthrust force is also known as buoyant force and is…

 ELECTROMAGNETIC SPECTRUM Electromagnetic spectrum is a continuum of all electromagnetic waves arranged according to frequency and wavelength. It includes visible light, ultra-violet rays, microwaves, X-rays, radio waves and gamma rays.…

ELECTROMAGNETIC INDUCTION Electromagnetism is the effect resulting from the interaction between an electric current and a magnetic field. This effect brings about induced electromagnetic force (e.m.f) and the resulting current is called…

MAINS ELECTRICITY FORM FOUR MAINS ELECTRICITY FORM FOUR:MAINS ELECTRICITY Sources of mains electricity Mains electricity comes from a power station and its current is the alternating current which can either be stepped up or down by…

CATHODE RAYS FORM FOUR CATHODE RAYS These are streams of electrons emitted at the cathode of an evacuated tube containing an anode and a cathode. Production of cathode rays They are produced by a set up called a discharge tube…

X-RAYS FORM FOUR PHYSICS X-RAYS FORM FOUR PHYSICS:X-RAYS X-rays were discovered by a German scientist namedRoentgen in 1985. They can pass through most substances including soft tissues of the body but not through bones and most…