The three changes of state during which energy is absorbed are:
1. Change from solid to liquid - Melting.
2. Change from liquid to gas - Vaporization
3. Change from solid to gas - Sublimation
All these changes of state require heat energy to break the attractive forces that hold the particles of the molecules together, so that they can move into more disorderly states. For instance, when heat is applied to a solid, the solid absorbs the heat and use it to break the attractive forces that are holding the molecules of the solid together. At a particular temperature, the attractive forces will be completely overcome and the solid framework will collapse, thus leading to the melting of the solid.
Answer:
b
Explanation:
all living things are made up of cells.
The correct answer would be "Density is the amount of matter in a certain volume"
Answer:
Lactic Acid
Explanation:
Lactic acid builds up during strenuous movement combined with lack of sufficient oxygen.
<span>Proteins are composed of __20__ amino acids, of which __9__ are essential amino acids and __11__ are nonessential amino acids.</span>
