Perform the conversions from common English units to metric units. A pencil has a length of 7.00 in. What is its length in centimeters? 7.00 in = There is 4.53 L of water in a container. Calculate the volume of water in gallons. 4.53 L = A road sign indicates a speed limit of 55 mi/h. What is this speed limit in kilometers per hour? 55 mi/h = cm gal km/hr
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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