Indicators are substances that change colour when they are added to acidic or alkaline solutions. Litmus, phenolphthalein, and methyl orange are all indicators that are commonly used in the laboratory.

Formation of curd from milk is a chemical change as a new substance is formed and the original material i.e milk can not be changed back from curd.

Triangle :A triangle is a polygon with three edges and three vertices. It is one of the basic shapes in geometry.  Properties:The properties of the triangle are:Area of a triangle $= \frac{1}{2} \times Base \times Height$.The perimeter of a triangle is the sum of all its three sides.The sum of ... Read More

Given :The given expression is $279 \times 92 + 8 \times 4279$.To do :We have to simplify the given expression.Solution : $279 \times 92 + 8 \times 4279 = 279  \times  (100-8) + (10-2)  \times  4279$                                      $ = 279  \times  100 - 279  \times  8 + 10  \times  4279 - 2  \times  4279$                                       $= 27900 - 279  \times  (10-2) + 42790 - 8558$                                      $ = (42790+27900) - 279  \times  10 + 279  \times  2 - 8558$                                       $= (70690+558)-(2790+8558)$                                       $= 71248-11348$                                       $= 59900$.Therefore, the value of $279 \times 92 + 8 \times 4279$ is 59900.

Yes, the centrosomes help in cell division. It is an important part of how the cell organizes the cell division, and organize the microtubules. They maintain the chromosome number during cell division and also organize the microtubules.

Given :The given terms are,  (a) $11+(-7)$(b) $(-13)+(+18)$(c) $(-10)+(+19)$)(d) $(-250)+(+150)$.To do :We have to add the given terms without using the number line.Solution :We know that, $(+) \times (-) = (-)$$(+) \times (+) = +$ (a) $11+(-7) = 11-7 = 4$.The sum of $11$ and $-7$ is $4$.(b) $(-13)+(+18) = ... Read More

Applications of the Compound Microscope are as follows:1. A compound microscope is used in pathology labs to identify diseases by identifying disease-causing microbes.2. In forensics, human cell and food samples collected from the criminal cases and scenes are detected and solved by examining them under the microscope in forensic laboratories.3. ... Read More

A female reproductive system is made up of the internal and external sex organs whose function is to enable reproduction of the new offspring or species. The female external reproductive organs are the secondary organs that are visible externally and also known as Vulva (which means covering).  The vulva ... Read More

Motion is the phenomenon in which an object changes its position or orientation from with respect to a frame of reference over time. It can be described in terms of distance, displacement, acceleration, velocity, speed and time.For example:- pushing a block, opening a door, rotating stone with attached thread etc. There are ... Read More

Given :The given number is 39278.To do:We have to convert the number into roman numerals.Solution :39278 in Roman numerals is written as $\overline{XXXV} MMMMCCLXXVIII$.