Analysing Interference of WavesFigure shows two drops of rain water falling on the surface of a pond, producing two sets of circular waves. When the two sets of waves overlap with each other, they will form an interference pattern. Interference of waves …

Analysing Sound WavesSounds are mechanical waves. They are caused by vibrating objects. The string of a guitar, the skin of a drum and a tuning fork, all of these vibrate to produce sound. The vibrating cone of a loudspeaker in Figure produces sound. Its…

How Does a Transformer Work?Figure shows a power supply unit found in school laboratories. It is connected to the mains supply which supplies it with an input voltage of 240 V. Using the voltage selector, you can select output voltages from 2 V to 12 V.…

Applying Scientific Investigations We study science to discover information about our environment. Professional scientists are concerned with investigations and making discoveries. Students usually study and investigate theories and discoveries already …

What Is MomentumEvery moving object has momentum. However, the momentum of a timber lorry is very much bigger than that of a cyclist, despite them moving at the same speed.The product of mass and velocity is called ‘momentum‘. \(\text{i}\text{.e}\text{. …

Newton’s Laws Of Motion(A) Newton’s First Law of MotionA body can not change its state of motion by itself. If the object is at rest it will remain at rest and if it is in uniform motion, it continues to be in motion unless some external force is applied…

What is the Formula for Specific Heat Capacity?Specific Heat Capacity Figure shows water and cooking oil in similar pots and supplied with heat at the same rate. Which liquid heats up at a faster rate: water or cooking oil? Such a deduction would be diff…

Understanding Measurements Physics is based on measurements. Experiments which are the key to the development of physical theories involve measurements of various physical quantities.Various measuring instruments are used for different types of measurem…

Understanding Scalar and Vector QuantitiesPhysical quantities can be grouped into scalar quantities and vector quantities.Above Figure shows a truck travelling a distance of 50 km in the eastward direction. We describe the journey of the truck by stating…

What is Kinetic EnergyKinetic Energy: The energy of a body due to its motion is called kinetic energy. In other words. The ability of a body to do work by virtue of its motion is called its kinetic energy.Expression for Kinetic Energy: The kinetic energ…