Science Tech

 Determination of focal length of concave miror by single pin method. [Relation between u-v-f (numerical examples) Spherical mirrors It is a mirror which has the shape of a piece cut out of a spherical surface. Two types of spherical mirrors are;   Concave mirror: Its inner concave surface reflects, and has polished outer … Read more Determination Of Focal Length Of Concave Miror By Single Pin Method.

 Dry cell A dry cell is an electrochemical cell that uses a low-moisture electrolyte instead of a liquid electrolyte as a wet cell does. This feature makes the dry cell much less prone to leaking and is therefore more suitable for portable applications. The zinc-carbon battery is one of the most common examples … Read more Dry Cell

 Ray optics Nature of light Light is a transverse, electromagnetic wave that can be seen by humans. The wave nature of light was first illustrated through experiments on diffraction and interference. Like all electromagnetic waves, light can travel through a vacuum. The transverse nature of light can be demonstrated through polarization. Light is … Read more Light

 Refraction of light Refraction is the bending of light (it also happens with sound, water and other waves) as it passes from one transparent substance into another.  This bending by refraction makes it possible for us to have lenses, magnifying glasses, prisms and rainbows. Even our eyes depend upon this bending of light. … Read more Refraction Of Light

 Green pharmacy Green pharmacy is the design of pharmaceutical products and processes that eliminate or reduce significantly the use and generation of hazardous substances and the prevention/reduction of environmental/safety and health impacts at the source. Herbal medicine also called botanical medicine or phyto medicine. Herbalism is a traditional medicinal or folk medicine practice based on … Read more Green Pharmacy

 Excretory System Introduction v  If you exercise on a hot day, you are likely to lose a lot of water in sweat. Then, for the next several hours, you may notice that you do not pass urine as often as normal and that your urine is darker than usual. v  Do you know … Read more Excretory System

  

 Intoxicants The intoxicants used in society  might be taken as the following: alcohol, bhang, ganja, tobacco and opium, coca etc. Alcohol as an intoxicant Alcohol, also known by its chemical name ethanol, is a psychoactive substance that is the active ingredient in drinks such as beer, wine, and distilled spirits (hard liquor). It … Read more Intoxicants

 Properties and applications of petroleum products Gases Gaseous refinery products include hydrogen, fuel gas, ethane, propane, and butane. Most of the hydrogen is consumed in refinery desulfurization facilities, which remove hydrogen sulfide from the gas stream and then separate that compound into elemental hydrogen and sulfur; small quantities of the hydrogen may be … Read more Properties And Applications Of Petroleum Products

 Food laws and regulations Until recently, effectiveness of food control in the Indian domestic market was found to be severely undermined by the existence of multiple jurisdictions, and weaknesses in surveillance, monitoring and enforcement. Several of these food laws were enacted under different ministries in India that had their own rules and orders, … Read more Food Laws And Regulations