How energy is harnessed from different sources of energy?
Non-renewable energy resources are available in limited supplies, usually because they take a long time to
replenish. Renewable resources, on the other hand, replenish themselves.
Coal used for power generation is burned to provide steam for running steam turbine. It can also be converted
into liquid and gaseous fuels where the coal undergoes more complete combustion and needs high pressure
and high temperature.
Crude oil or petroleum must undergo refining in order to extract the useful substances.
Natural gas is composed mainly of methane is the cleanest of all the fossil fuels.
Biogas is a fuel composed mainly of methane. It is produced when organic matter is allowed to undergo
decomposition in the absence of oxygen (animal manure, sewage, etc.). When biogas is extracted from animal
waste a biogas digester is used.
Biomass is biological material derived from living or recently living organisms. Biomass can equally apply to
both animals and vegetable derived material.
Household & Cleaning Products
Astringent cleaning agent that helps to disinfect and sanitize the materials and furniture in our home.
Cleaning product its main function of this item is to prevent the spread of infectious diseases and control
allergens.
Dishwashing liquid household cleaning product that is used for cleaning dishes, plastics, and many others.
Sodium hydroxide and potassium hydroxide the most commonly used alkali in soap and detergents.
Oxidizing bleach works by changing the double bonds of a chromosphere into single bonds.
Acidic cleaners are best for removing mineral deposits, rust stains or discolouration from copper and other
metals. Alkaline cleaners, by contrast, are especially good at breaking down fatty or oily deposits, which is why
many laundry detergents are alkaline, or basic.
Carbonic acid-based cleaning solutions can be used to clean carpets, rugs, and upholstery. They help lift and
dissolve stains, refresh fabrics, and eliminate odors.
Acetic acid is the acid in clear white vinegar and is a natural all-purpose cleaning agent. It is best for general
household cleaning on surfaces that can tolerate a strong, acidic product. Vinegar removes hard water
deposits from glassware, rust stains from sinks, and tarnish from brass and copper.
Abrasives remove some of the oil residue that you sued after cooking menudo in the
kitchen utensils
Aluminum-based compound – active ingredient of products such as anti-perspirant deodorant.
Earth and Universe
Aristotle believed that objects outside the Earth follow Celestial motion which has no ending and beginning.
Aristotle to describe a violent motion caused by a push or a pull.
Projectile Motion is a combination of uniform motion in the horizontal direction and uniformly accelerated
motion in the vertical direction.
Activation Energy is the minimum energy requirement needed for a chemical reaction to occur
Scaterring - When sunlight enters the atmosphere of the earth, the atoms and molecules of different gasses
present in the air absorb the light. Then these atoms re-emit light in all directions.
When white light is passed through a glass prism it splits into its spectrum of colours (in order violet, indigo,
blue, green, yellow, orange and red) and this process of white light splitting into its constituent colours is
termed as dispersion.
Diffraction of light occurs when light waves pass near a barrier and spread out.
Interference of light is the phenomena of multiple light waves interacting with one another under certain
circumstances, causing the combined amplitudes of the waves to either increase or decrease.
A shadow is light blocked by an object.
Reflection is when light bounces off an object.
Refraction is the bending of light (it also happens with sound, water and other waves) as it passes from one
transparent substance into another.
Blue light is scattered more than the other colors because it travels as shorter, smaller waves. This is why we
see a blue sky most of the time. During sunset and sunrise, the sun is near the horizon, and therefore, the
sunlight has to travel larger distance in the atmosphere. Due to this, most of the blue light (shorter
wavelength) are scattered away by the particles. The light of longer wavelength (red color) will reach our eye.
Solve for frequency of light
λ = v/f
Where
λ = wavelength (m)
v = velocity (m/s)
f = frequency (Hz)
Review on
Solving for moles
Limiting Reactant
Excess grams in equation
Magnification of lens – m= height of image/height of object
Solving on length of radio waves