The electroscope was invented by the British physician William Gilbert around \(1600.\) Have you touched

Van der Waals Forces: The existence of weak attractive intermolecular forces was first proposed by Johannes

Bohr's Model of Hydrogen Atom Bohr gave the postulates as below: (1) Electrons can only

Discovery of Electron Research into the electric discharge in the discharge tube (J.J. Thomson, 1896)

Cos 120° is commonly used in both trigonometry and calculus in the higher grades. The

Equation of Progressive Wave: Progressive wave is one of the types of waves, and it

Deficiency Symptoms of Essential Elements: Plants require various mineral elements for their normal growth, development

Electron Transport Chain in Photosynthesis: Electrons travel through photosystem \({\rm{II}}\) and then pass through photosystem

Equilibrium of the Body: Equilibrium in physics is the system's condition when neither its state

Fundamental Laws of Gases: Have you ever noticed that if you take a basketball outside