College fair? I really cant say based off the lack of context clues in the question and no additional information.
Elements emit colours when heated because electrons in atoms can have only certain allowed energies.Heating an atom excites its electrons and they jump to higher energy levels. When the electrons return to lower energy levels, they emit energy in the form of light. Every element has a different number of electrons and a different set of energy levels. Thus, each element emits its own set of colours. See, for example, mercury and neon above. Those colours are as distinctive to each element as fingerprints are to people.
Answer:
4- D laissez-faire
Explanation:
laissez-faire literally means "hand off"
<span>The membrane lining the interior of the thoracic cavity is called the 3. parietal pleura.
Thorax is the part between the neck and the abdomen. Parietal, in anatomy, refers to the walls of a hollow structure, such as the thoracic cavity in the human body. Pleurae are the sacs surrounding your lungs.
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Answer:B
Explanation: An analog audio signal is measured at regular intervals. Each measurement is stored as a sample, which is represented at the lowest level as a sequence of bits.
