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What is Boiling Point?

What is Boiling Point? Boiling point is usually defined as the temperature with which an element or a substance (specifically liquids) comes to a boil. Scientifically, it is defined as temperature at which a liquid’s vapor pressure is on par with the environmental pressure surrounding it. A liquid has a low boiling point when contained [...]

What is Voltage?

What is Voltage? People often hear or read the word voltage. Voltage is a part of everyone’s daily life. People can read it in each electrical appliance used in their homes. Even the computer you are using to read this article right now is utilizing voltage. What is voltage? Voltage is a kind of driving [...]

What is kWh?

What is kWh? The symbol kWh stands for kilowatt-hour, which is a unit of energy amounting to one kWh. KWh is not used in any formal system as standard unit. However, the unit is used to determine the consumption of electricity. It is commonly used in household electrical applications. With the use of a kilowatt-hour [...]

What is Inertia for Kids?

What is Inertia for Kids? Inertia is a nice and easy physics lessons for kids and children. In physics, inertia is part of Isaac Newton’s First Law of Motion simply stating that a particular object at rest will stay in that state unless otherwise a force is put on it for the object to move. [...]

What is Buoyant Force?

What is Buoyant Force? Buoyant force refers to the amount of pressure exerted on a particular object when placed on some kind of fluid. In scientific terms, fluids may either be liquid or gas. This concept is based on the Archimedes principle that the force acting on an object in a liquid is equal to [...]

What is Escape Velocity?

What is Escape Velocity? Escape velocity refers to the velocity required on a particular body for it to counteract the effect of gravitational force that would make it slow down and return back to its origin. This concept of physics can be easily understood when an object or body is pushed up in the air. [...]

What is buoyancy and how does it relate to balloons?

What is buoyancy and how does it relate to balloons? Buoyancy is the property of objects that make them float on water.  In simple terms, whenever an object is lighter than water, for example, it is expected to float.  For most experts, many of them prefer the term “density” when speaking about buoyancy. When an [...]

What is focal length?

In the field of photography, focal length is one of many terms that is commonly used among expert photographers and enthusiasts.  Many people may also encounter this term when reading labels for digital or SLR cameras.  Focal length is basically the length or distance from the camera’s lens to its focal point.  In technical terms, [...]