Lern/ConcepT

  Elastic Modulus— The ratio of stress and strain is known as Elastic Modulus. Elastic Modulus (E) = Stress (σ) / Strain (ϵ)   The constant of proportionality depends on the material being deformed and the nature of the deformation. This constant is called the elastic modulus . The elastic modulus determines the amount of force required per unit deformation. Ø   A material with large elastic modulus is difficult to deform. Ø   With small elastic modulus is easier to deform.   HOOKE’S LAW— Within the elastic limit, Stress- Strain ratio is constant. [Stress/Strain = Constant] “In an elastic member stress (σ) is directly proportional to the strain (ϵ) within elastic Limit.” σ ∝ ϵ σ = E. ϵ or, E = σ / ϵ Where, σ = Stress ϵ = Strain E = Constant (modulus of Elasticity / Young’s Modulus) ϵ à                ...

 Inertia--  a property of matter by which it remains at rest or in uniform motion in the same straight line unless acted upon by some external force

  Amino acids neurotransmitters These neurotransmitters are involved in most functions of your nervous system. Glutamate.  This is the most common excitatory neurotransmitter of your nervous system. It’s the most abundant neurotransmitter in your brain. It plays a key role in cognitive functions like thinking, learning and memory. Imbalances in glutamate levels are associated with  Alzheimer’s disease ,  dementia ,  Parkinson’s disease  and  seizures . Gamma-aminobutryic acid (GABA).  GABA is the most common inhibitory neurotransmitter of your nervous system, particularly in your brain. It regulates brain activity to prevent problems in the areas of  anxiety , irritability, concentration, sleep, seizures and  depression . Glycine.  Glycine is the most common inhibitory neurotransmitter in your spinal cord. Glycine is involved in controlling hearing processing, pain transmission and metabolism. Monoamines neurotransmitters These neur...

 

  Factors affecting Solubility; Solubility of v Solid in Liquid v Gas in Liquid v Liquid in Liquid Solid in Liquid: When Solute   is in solid form and   solvent   is in liquid form and then solid dissolve in the liquid. Factors: o    Nature: If Nature is Same, solubility is good. E. g.- Polar solute in polar solvent. o    Surface Area:   If surface area of the solute is more, solubility increases. o    Temperature: When we dissolve solid into liquid, two reaction occurs à §   Exothermic:   Heat releases for dissolve. §   Endothermic: It absorb heat for dissolve.   Gas in Liquid: When solute is in gas form and solvent is in liquid form. -          Nature does not affect the solubility. Factors: o    Surface area: Directly proportional to solubility. o    Temperature:  ...

 

Terms of pH The 'p' in pH stands for "potenz" meaning "power" in Danish. Since the scale was given by a Danish Chemist Sorensen.  H stands for Hydrogen and is its symbol. Hence H is written in capital letter.