Given :The quadrilateral ABCD is given.To do :We have to find the value of x.Solution :$$Sum of the angles in a quadrilateral is 360°$$.Therefore, $45°+50°+55°+ ∠ADC = 360°$          [Here, $∠ADC$ is the angle opposite to $∠x$]$∠ADC = 360° - 150°$$∠ADC = 210°$We know that, Sum of ... Read More

Definition:Pollution is the introduction of contaminants or unwanted harmful substances into the natural environment that cause adverse change. Pollution can take the form of chemical substances or energy, such as noise, heat or light.Pollutants, the components of pollution, can be either foreign substances/energies or naturally occurring contaminants. Causes:Some of the main ... Read More

Answer: Volume = 103 cm^3 = 103/1000000 = 0.000103 m^3 Mass = 0.280 Kg= 280 g Density in gm/cm^3 = Mass/Volume = 280 g/103 cm^3 = 2.72 g/cm^3 Density in kg/m^3 = 0.280 /0.000103 = 280/0.103 = 2720 Kg /m^3

Soluble means when a solute that dissolves in a solvent it is known as soluble.Eg: salt is soluble in water as it readily dissolves and mixes with water.

The instrument that measures ozone in the atmosphere is called a Dobson spectrophotometer.It measures the intensity of sunlight at two ultraviolet wavelengths: one that is strongly absorbed by ozone and one that is weakly absorbed.

By definition, a rational number is a number that can be written in the form p/q where p and q are integers and q is not equal to zero.Rational numbers include:All integers,    ....-3, -2, -1, 0, 1, 2, 3.....All fractions like 2/3, 3/4, 5/6, 1/2 etc.All normal decimals like ... Read More

The universal indicator is used to know the strength of acid or base. Universal indicator is a mixture of several indicators. It is a pH indicator made of a solution of several compounds that exhibits several smooth colour changes over wide range pH values to indicate the acidity or alkalinity of solutionsThe ... Read More

Given :The given term is $\sqrt{\frac{4}{6}}$.To do :We have to find the value of the given term.Solution :$\sqrt{\frac{4}{6}}$We know that, $\sqrt{\frac{a}{b}} =\frac{\sqrt{a}}{\sqrt{b}}$  $\sqrt{\frac{4}{6}} = \sqrt{\frac{2}{3}}$            $= \frac{\sqrt{a}}{\sqrt{b}}$                          $= \frac{1.41}{1.73}$            ... Read More

Potato is a stem and sweet potato is a root because, The stem of the potato has undergone modifications in order to store food which is termed as stolons. Potato tubers (modified stems are usually called ‘tubers’) have buds that sprout stems and leaves from them while roots do ... Read More

Polymer, any of a class of natural or synthetic substances composed of very large molecules, called macromolecules, that are multiples of simpler chemical units called monomers.Polymers make up many of the materials in living organisms, including, for example, proteins, cellulose, and nucleic acids.Example: plastics.