Kids Questions & Answers

Earlier, the power of a magnet was only measured in units of gauss. Gauss defines the number of lines of magnetic (flux density) per square centimetre emitted from the surface of the magnet. Today, it is measured in gauss-oersted energy units (GOe). While gauss refers to the number of lines of flux emitted from a magnet, oersted is the unit …

The uncertainty principle was laid down by Heisenberg, and is called Heisenberg’s principle of uncertainty. According to it, it is impossible to measure simultaneously the position and momentum/ velocity of a moving electron. If any attempt is made to measure both at the same instant, there will be uncertainty in measurement of either. This is because to measure the position …

The Treynor Ratio (reward-tovolatility ratio) was developed by Jack Treynor, one of the fathers of modern portfolio theory. The ratio measures the returns earned from a portfolio over and above the normal return that would have been earned on a risk-free investment. The formula for the Treynor Ratio is: average return of the portfolio minus average return of the riskfree …

When we were small, we used to look up to the sky and often see a white trail left by a jet aircraft. Rocket! Rocket! We used to yell, jump up with joy, clap our hands and strain our eyes as the ‘rocket’ disappeared into the horizon. Soon, the white streak would change into a broken, twisted cloud path. And …

The Time Preference Theory of Interest is also known as The Agio Theory of Interest. It was presented by Bohm Bawerk, who said that interest is an agio (reward) or (premium) for time preference. People prefer present income, present consumption and present satisfaction of wants, which means that people are impatient to spend. To induce them to postpone their consumption, …

The universal recycling symbol is an internationally recognized symbol used to designate recyclable materials. It is composed of three chasing arrows that form a Mobius strip or unending loop. In 1969 and early 1970, worldwide attention to environmental issues culminated in the first Earth Day. In response, then Chicago-based Container Corporation of America, a large producer of recycled paperboard which …

It’s a software that facilitates speed learning, particularly of languages. It’s based on an algorithm which calculates the precise moment when a person is likely to forget something she has learnt. The program would then remind her about going over that information once again, during those times. It was invented by Piotr Wozniak.

When you look up into the sky on a clear night, you see lots of stars twinkling there. The sun is a star, and it shines by its own light, which is formed by bursts of energy from the inside of the sun rising to the surface. The sun is extremely hot so hot that it would turn anything as …

The strength of any material is its ability to resist stretching, pressing together, and tearing what the scientists call tension, compression and shear. No one material is the strongest for all purpose. For example, cast iron is immensely strong in resisting steady compression, but is easily broken by a sharp hammer blow. Some materials are made stronger by the addition …

The stroboscopic effect is a phenomenon due to interrupted illumination of a moving object. When an oscillating body is seen in periodically interrupted light (a series of light flashes occurring at a definite rate) it appears different. If the periodicity of the vibrating body is same as that of the flashing light, the body appears to be stationary. In movies, …