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The word resonance comes from Latin and means to "resound" - to sound out together with a loud sound. Resonance is a common cause of sound production in musical instruments. One of our...
Conservation of Momentum When the mechanical properties of the system do not change then the system is in isolated state and it is called an isolated system. These systems...
In 1923, in his doctoral dissertation, Louis de Broglie proposed that all forms of matter have wave as well as particle properties, just like light. The wavelength, , of a particle, such as...
Towards the end of the 19th century, it had been experimentally observed that when ultraviolet light was shone on a negatively-charged electroscope, the charged leaves fell closer together;...
Electromagnetic Induction We have seen previously that when a DC current pass through a long straight conductor a magnetising force, H and a static magnetic field, B is...
The gravitational attraction between lead spheres. The data from the demonstration can also be used to calculate the universal gravitational constant G. Photo courtesy Clive Grainger...
Projectile Motion Formula We often experience many kinds of motions in our daily life. Projectile motion is one among them. A projectile is some object thrown in...
A force is a push or pull upon an object resulting from the object"s interaction with another object. Whenever there is an interaction between two objects, there...
Law of Conservation We have often heard phrases like, "Conserve energy; turn off the lights." To scientists, conservation of energy is something entirely...
As you can imagine, there is definitely more to whether an object floats or not than just average density. For example, why do some objects float higher in the water than others? And why is it...
Temperature is a physical quantity which gives us an idea of how hot or cold an object is. The temperature of an object depends on how fast the atoms and molecules which make up the object can...
Pressure The scientific units of pressure can be determined from its definition: A force applied to surface with an area A will...