This document defines matter and describes various physical properties of matter including conductivity, malleability, viscosity and solubility. It classifies matter as elements, compounds, homogeneous or heterogeneous substances and mixtures. It distinguishes between extensive properties that depend on amount and intensive properties that do not. Physical changes are described as changes in shape or phase that do not create new substances.
Adhesion is one of the significant parameter which leads to mechanical wear. This presemntation gives brief information about adhesion, molecular interaction between two mating surfaces and factors affecting adhesion. Study of interfacial forces between mating surfaces helps in selection of surface materials to prevent adhesion. Failure of lubricant’s basic function relates to failure of separation of two surfaces which results in adhesion between sliding surfaces. Adhesion is not observed between two surfaces casually placed together due to existing oxide film and contaminants. Surface energy, reduced roughness, high hardness can depress adhesion.
Adhesion is one of the significant parameter which leads to mechanical wear. This presemntation gives brief information about adhesion, molecular interaction between two mating surfaces and factors affecting adhesion. Study of interfacial forces between mating surfaces helps in selection of surface materials to prevent adhesion. Failure of lubricant’s basic function relates to failure of separation of two surfaces which results in adhesion between sliding surfaces. Adhesion is not observed between two surfaces casually placed together due to existing oxide film and contaminants. Surface energy, reduced roughness, high hardness can depress adhesion.
Students, digital devices and success - Andreas Schleicher - 27 May 2024..pptxEduSkills OECD
Andreas Schleicher presents at the OECD webinar ‘Digital devices in schools: detrimental distraction or secret to success?’ on 27 May 2024. The presentation was based on findings from PISA 2022 results and the webinar helped launch the PISA in Focus ‘Managing screen time: How to protect and equip students against distraction’ https://www.oecd-ilibrary.org/education/managing-screen-time_7c225af4-en and the OECD Education Policy Perspective ‘Students, digital devices and success’ can be found here - https://oe.cd/il/5yV
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
We all have good and bad thoughts from time to time and situation to situation. We are bombarded daily with spiraling thoughts(both negative and positive) creating all-consuming feel , making us difficult to manage with associated suffering. Good thoughts are like our Mob Signal (Positive thought) amidst noise(negative thought) in the atmosphere. Negative thoughts like noise outweigh positive thoughts. These thoughts often create unwanted confusion, trouble, stress and frustration in our mind as well as chaos in our physical world. Negative thoughts are also known as “distorted thinking”.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
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Ethnobotany and Ethnopharmacology:
Ethnobotany in herbal drug evaluation,
Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.
4. Classifying Matter Matter Elements Compounds Homogeneous Heterogeneous All matter has physical and chemical properties. Pure Substances Mixtures
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Editor's Notes
Extensive Properties : depend upon the amount of the substance present. Examples: mass, length, volume
Intensive Properties : independent of the amount of substance present. Examples: density, color, state, melting point, boiling point, texture, conductivity, malleability, ductility
This is simply how readily the oil flows. A higher viscosity oil will withstand more heat than a lower viscosity oil. However, at colder temperatures it can actually become so thick that your starter cannot turn over the engine - and worse yet it won't flow to all the moving parts it should. A viscosity that is too low won't maintain a lubricating film on engine parts - allowing them to make metal-to-metal contact. Either extreme is very bad! The first number on a multi-grade oil indicates the "cold" viscosity of the lubricant - the second number the "hot" viscosity. For example, a SAE 10W-40 motor oil would have a viscosity rating of 10 at 0-degrees Fahrenheit (the W indicates "Winter") and a 40 rating at its maximum recommended temperature (not engine operating temperature - ambient air temperature).
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