Answer:
Visible Light Absorption
Atoms and molecules contain electrons. It is often useful to think of these electrons as being attached to the atoms by springs. The electrons and their attached springs have a tendency to vibrate at specific frequencies. Similar to a tuning fork or even a musical instrument, the electrons of atoms have a natural frequency at which they tend to vibrate. When a light wave with that same natural frequency impinges upon an atom, then the electrons of that atom will be set into vibrational motion. (This is merely another example of the resonance principle introduced in Unit 11 of The Physics Classroom Tutorial.) If a light wave of a given frequency strikes a material with electrons having the same vibrational frequencies, then those electrons will absorb the energy of the light wave and transform it into vibrational motion. During its vibration, the electrons interact with neighboring atoms in such a manner as to convert its vibrational energy into thermal energy. Subsequently, the light wave with that given frequency is absorbed by the object, never again to be released in the form of light. So the selective absorption of light by a particular material occurs because the selected frequency of the light wave matches the frequency at which electrons in the atoms of that material vibrate. Since different atoms and molecules have different natural frequencies of vibration, they will selectively absorb different frequencies of visible light.
Answer:
She realizes that her race and gender will make it difficult for her to achieve her goals.
Explanation:
Answer: (7) It appears that tremendous numbers of consumers are influenced by advertising, despite their claims to the contrary.
Explanation:
The main idea of this passage is that advertising works despite people's claims to the contrary.
This is the main idea because every other sentence centres around this one with the first sentence attempting to explain how it works.
The second sentence then attempts to disprove it while the third, fourth, fifth and the sixth show show evidence of its truthfulness.
Mercantilism served to improve the economy
of Great Britain by requiring the products of
the Americas to come directly to it at minimal
value and that the American population would
have to buy British manufactures at inflated
prices. Conversely, this hurt both nascent
industry in the Americas and forced
Americans who wanted to trade with more
local neighbors to engage in smuggling
operations.