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The words “accuracy” and “precision” are frequently used terms in measurement. Despite their frequent interchangeability, these two terms have different meanings in the condition of measurement and are vital to understand the capabilities and constraints of measuring devices. Accuracy :- The level to which a measurement resembles the true or accepted value is known as … Read more

Niels Bohr’s proposal of the Bohr’s model for hydrogen atom structure discovered in 1913. Rutherford’s atomic model had defect that Bohr fixed with a quantum-based model, especially when it came to atomic stability and spectral lines. Bohr’s theory provided the first quantum explanation of atomic structure by using quantum mechanics to explain how electrons behave … Read more

Time measurement is essential for sciences. As part of the foundation of measurements in mechanics. We can measure how long events last and how quickly a system is changing by using time, a continuous, non-spatial quantity. A component of the SI (International System of Units), the second unit of time serves as the foundation for … Read more

Rutherford made a vital contribution to atomic structure. J.J. Thomson’s “plum pudding” model, which saw atoms as positively charged spheres with negatively charged electrons buried within, was the dominant theory prior to Rutherford. However, Rutherford’s model presented a radically different image, demonstrating that the atom is made up of a compact, tiny, positively charged nucleus … Read more

An object’s mass, a basic feature of matter, indicates how much material it contains. It is important in many scientific fields, particularly physics, where knowledge of mass is necessary to investigate ideas like force, momentum, and inertia. Mass is independent of an object’s location, which is dependent on gravity. What is Mass? Inertia, or an … Read more

Thomson model of atom, proposed by British physicist J.J. Thomson in 1904, was one of the earliest scientific models aimed at explaining atomic structure. Often called the “plum pudding model,” it describes an atom as a sphere of positive charge with negatively charged electrons embedded within it, similar to raisins in a pudding or seeds … Read more

Length refers to the dimension of an object or the distance between two points. Accurate measurement of length is vital for conducting scientific experiments. Here we shall discuss different methods and instruments for measuring length, ranging from everyday tools like rulers to more advanced techniques used in scientific research. Units of Length The International System … Read more

Stoichiometry is the branch of chemistry that deals with the quantitative relationships between the reactants and products in a chemical reaction. It is derived from the Greek words “stoicheion” (element) and “metron” (measure), stoichiometry provides a outline for predicting how much of each substance is needed or produced in a reaction. Importance of Stoichiometry :- … Read more

In our everyday, experience, besides gravitational force, we encounter several kinds of forces like frictional force, the force of buoyancy and viscous force, contact force between the bodies, the force due to surface tension of a liquid and so on.  In later 20th century, we come to know that these different forces occurring in different … Read more

Introduction:- The atomic theory of matter was first proposed by john Dalton, in 1808. His theory, called Dalton’s Atomic Theory, regarded as the ultimate particle of matter. This theory was able to explain the law of conservation of mass, law of constant composition and law of multiple proportion. However, it failed to explain the results … Read more