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The preterite and perfect tenses are both used when an action has been completed. Then, what is the difference? Well, their use depends on regional differences and varieties of Spanish. But don't p...

Elements in the periodic table are arranged by increasing atomic number (number of protons). Atomic number of elements steadily increases across a period (horizontal rows of the periodic table). Elements ...

Particles in a solid state are packed very close together whereas in a gaseous state they are very far apart.Particles in a solid state have a regular, structured pattern whereas gaseous particles are ran...

Cysteine contains an S atom in its R group. Where 2 molecules of cysteine are found together, strong covalent bonds or "disulfide bridges" can form between the two S atoms (S=S). R...

Respiration is the process by which cells make energy. Aerobic respiration uses oxygen to make energy. Respiration involves a series of reactions.
The overall equation for the reaction is:Oxygen + G...