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.
The mosiac covenant as the name of the special agreement that would bind the Israelite's to God.
Answer:
When you add lemon juice to water, the water changes color. Then, when you add sugar to the mixture and stir, the sugar dissolves and is no longer solid white. Lemonade is an example of a solution: a mixture of one or more substances dissolved evenly into another substance.
Explanation:
Answer:
The humanistic psychology.
Explanation:
This field of psychology emphasises the personal growth potential of the individual. It was founded by Carl Rogers and Abraham Maslow. This field is concerned with human flourishing and personal development, focusing only on the whole person, as the exercise details.
Answer:Hunting and gathering society.
Hunting and gathering society is a type of society where dwellers rely majorly on hunting for wild animals andgathering of foods ,nuts and vegetables for survival.Ten thousand years ago,all societies practices hunting and gathering to provide food on their tables until there were initiatives on how to cultivate crops and rear animals.
Explanation:
