it is also chemically bleached to whiten it. later, it is passed through rollers to flatten it. then sheets of wet paper are produced. finally, the water is removed from the sheets 26、which are pressed, dried and refined until the finished paper is produced.iii. language focusunit foura...
The visible light emitted by the Sun is an example of matter. True | False 4. A microscope is an important optical instrument used for observing small objects. True | False 5. A molecule is a particle made up of two or more atoms that are chemically combined. True | False 6. ...
Plasma on surfaces: a myriad of new properties Plasma is matter with a high, unstable energy levels which is characterized, among other things, by a high electrical conductivity. Chemically, plasma is very reactive and can interact with surfaces, liquids or microorganisms. If it comes into contac...
Dextrose seems to pop up in everything. From processed foods to flavoured water, dextrose is a familiar name on ingredients lists. It’s also used by athletes to improve their performance. But what is dextrose? Is it a naturally-occurring substance or something man-made? Is dextrose sugar?
The so -called 'Fast fashion' is having a surprising environmental impact. 'Take water.The fashion industry,one of the world's largest users of water,consumes anywhere from 20 trillion to 200 trillion litres every year. 'Then there are microplastics.Plastic fibres are rel...
Chemistry is a science that tries to understand the properties of substances and the changes that substances undergo. It is concerned with the substances that occur in nature-the minerals of the earth,the gases of the air,the water and salts of the seas,the chemicals of the living creatures,...
What is hydroponics?Plants grow through a process called photosynthesis, in which they use sunlight and a chemical inside their leaves called chlorophyll to convert carbon dioxide (a gas in the air) and water into glucose (a type of sugar) and oxygen. Write that out chemically and you get ...
Photosynthesis is the process used by plants, algae and somebacteriato turn sunlight into energy. The process chemically converts carbon dioxide (CO2) and water into food (sugars) andoxygen. The chemical reaction often relies on a pigment called chlorophyll, which gives plants their green color....
a liquid conforms to the shape of the container in which it is held. Although this is similar to a gas, a liquid does not expand to fill up the container like a gas. Examples of liquids at room temperature (about 20 degrees Celsius or 68 degrees Fahrenheit) include water, oil, alcohol...
represented chemically as NH3, is a colorless gas with an acrid odor. Although it has many applications in industry and commerce, its necessity for agriculture cannot be underestimated. For farming, anhydrous ammonia is mostly used as a nitrogen fertilizer which provides plants with one of their ...