Archives

How to reduce friction?

Friction is a force that resists motion. The amount of friction depends on how an object is moved, such as sliding it or rolling it. In other... View Article

Why are solids rigid?

Solids can very easily be distinguished from liquids by their definite shape, considerable mechanical strength, and rigidity. There are many... View Article

What is neutralisation?

Many chemical reactions take place in our body and in our surroundings. Acids and bases are the common reacting agents. One important reaction... View Article

What is incident ray?

Answer: A ray that strikes the surface separating the two optical media is called the incident ray. The angle which the incident ray makes with... View Article