Given:Two angles of a triangle are in ratio 4:5 The sum of these angle is equal to the angle To do: Find the angles Solution: Let the two angles be $4x$ and $5x$. Third angle = sum of these angles = $4x + 5x = ... Read More

Given:Steamer goes downstream from one port to another in 9 hoursIt covers the same distance upstream in 10 hours To do: The speed of the stream be $1km/h. find the speed of the steamer in still water and the distance between the ports Solution:Let the speed of the steamer in ... Read More

The nanometre or nanometer is a unit of length in the metric system. It is equal to one billionth of a metre. One nanometre can be expressed as 1×10⁻⁹ m.

Given : Two rational numbers given to us are -1 and 0 To do : Find five rational number between -1 and 0 Solution: -1 can be written as $\frac{-10}{10}$ So, $\frac{-9}{10}, \frac{-8}{10}, \frac{-7}{10}, \frac{-6}{10}, \frac{-5}{10}$ are the five rational numbers between -1 and 0.

The word "ferment" is derived from the Latin word "fervere", which means 'to boil'. The science of fermentation is known as Zymology, derived from the Greek word meaning "the workings of fermentation", and also the study of the biochemical process of fermentation and its applications.Fermentation is a chemical process by which ... Read More

Oxygen reacts with Metals to give Metal Oxides through oxidation of Metals.Eg: iron reacts with oxygen in the air to give a reddish-brown oxide, iron (III)oxide. This is known as Rusting.                                                      

In terms of calories (energy), fats have the highest energy per gram, followed by carbohydrates.

The positioning of molecules affects the density of an object. • Objects with tightly packed molecules are denser than those where the molecules are spread out.• Objects that are denser than water sink and those less dense float. • Hollow things often float too as air is less dense than water.

Friction is an opposing force that exists between two surfaces which are in contact. It helps us a lot in doing many activities. There are 4 types of friction.1) Static frictionThis friction occurs when a body rests on the ground. For example, while trekking, the friction between your shoe and ... Read More

Lightning is a natural way of nitrogen-fixing in soil. Nitrogen in the atmosphere can be transformed into a plant-usable form, a process called nitrogen fixation, by lightning.Each bolt of lightning carries electrical energy that is powerful enough to break the strong bonds of the nitrogen molecule in the atmosphere. Once ... Read More