Answer: Both are chemical changes.
Explanation:
Tarnish can be defined as the product of the chemical reaction that occurs between a metal and a no-metal. The metal which is exposed to the moisture or get oxidized develop a thin layer called tarnish. Copper, silver, brass, magnesium and other metals get tarnished.
The polish removes the chemical product of tarnishing and keeps the silver in silver spoon intact. This involves the chemical reaction.
Salt and vinegar are the ingredients of the chemical formulation which can remove the chemical product of the tarnishing from penny. This involves the chemical reaction.
Both polish and silver and vinegar can bring a chemical changes in the metal without introducing the physical change as they do not affect the physical structure of the metal.
From 1519–21, a coalition army of Spanish soldiers and Tlaxcalan warriors led by Hernán Cortés and Xicotencatl the Younger defeated the Aztec Empire;
Answer: Inflationary Gap
Explanation:
Inflationary gap, which is also known as as expansionary gap, is a macroeconomic concept that gives the amount in which the actual gross domestic product exceeds anticipated GDP or aggregate supply at a level, which is expected to be potential full-employment GDP. In other word inflationary gap is the difference between economy's full employment real GDP and the actual gross domestic product
Physical movement helps humans to seek growth and maintain fitness by improving health and sharing of ideas allows them to gain knowledge and seek learning.
<h3>What is a sentence?</h3>
A sentence is referring a collection of words consisting of a subject and predicate defining the complete thought and clear meaning to the reader with the help of proper use of English Grammar structure.
Physical movement benefits an individual in maintaining health and seeking improvement in fitness.
Mental movement or sharing of ideas helps in brainstorming and gaining knowledge about various things.
Learn more about Physical movement, here:
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Explanation:
<h3>I hope it helps </h3>
<h3>Carry on learning</h3>
