Explanation:
(a) The given reaction equation is as follows.
(acidic)
So, here the reduction and oxidation-half reactions will be as follows.
Oxidation-half reaction: 
Reduction-half-reaction: 
As total charge present on reactant side is -1 and total charge present on product side is +3. And, since it is present in aqueous medium. Hence, we will balance the charge for this reaction equation as follows.
(acidic)
(b) The given reaction equation is as follows.
(basic)
So, here the reduction and oxidation-half reactions will be as follows.
Reduction-half reaction: 
Oxidation-half reaction: 
Hence, to balance the number of electrons in this equation we multiply it by 4 as follows.
Therefore, balancing the whole reaction equation in the basic medium as follows.
Answer:
Tornado warnings indicate imminent danger to life and property.
Explanation:
A tornado has been in sight or will come.
Answer: Elevation
Explanation:
The altitude of a feature of the earth's surface is usually called its elevation, vertical distance from a datum plane, usually mean sea level to a point above the earth. Often used synonymously with altitude, elevation is the height on the earth's surface and altitude, the height in space above the surface.
Answer:
Larger predators would cause the rabbit to run faster to outrun their predator, so speed is a variation. Also their environment where they might need to blend in with their surroundings so skin color.
Answer:
Copper metal will not react with sulfuric acid . ( Copper metal is too unreactive / it is " below hydrogen in the reactivity series " ). So use copper carbonate, it reacts easily to give copper sulfate ( and carbon dioxide and water ) .
Explanation:
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