37) In the United States, vision is tested by having the person attempt to read letters at a certain distance person's vision who scored 20/100 vision on the United States scale(1 inch-2.54 cm)? a similar test, however, the distance is measured in meters. from the chart to see what the normal person can see from 100 feet away. In Britain, eye doctors use For example, poor vision is 20/100, meaning that this person must be 20 feet away measured in feet. How would a British doctor record a a) 5.3/28 b) 6.1/31 c) 7.4/38 )8.5/42
States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
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