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Introduction to the Universe - Essay Example

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The differences in the sounds made can be attributed to the nature, structure and properties of the materials beneath the skin. In the forehead, there is a thin layer of flesh…
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Introduction to the Universe
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Download file to see previous pages Scientists use these properties to deduce the internal structure of the earth.
The study of the interior of the earth uses seismic waves. They are P-waves and S-waves. P-waves are longitudinal and, thus, they can travel through solids and liquids. S-waves are transverse. Thus, they can only travel through solids. P-waves also travel faster than S-waves. Geologists use these properties to study the internal structure of the earth. When the seismic waves pass through different layers, they get refracted. The same waves undergo reflection when they hit hard surfaces at certain angles. Seismometers located at various parts of the earth record the occurrence and properties of the seismic waves. The data can then be analyzed to ascertain the properties of the elements of the earth’s interior. In the analysis, the data recorded by seismometers is used to determine the distribution of P-waves and S-waves. In a region where the seismometers detect P-waves but not S-waves, it can be inferred that molten materials must have intercepted the S-waves. Thus, geologists use known properties of waves to study the internal structure of the earth (Indiana.edu).
Atoms have negative electrons that orbit around a nucleus that is positively charged. The nucleus has electrically neutral neutrons and positively charged protons. An atom has equal protons in the nucleus as the number of orbiting electrons. An atom in such a state is said to be electrically neutral. The protons determine the element that the atom represents. Bohr’s atom model was an early attempt that explained how atoms produce absorption and emission line spectra. An atom’s normal condition is when it possesses minimum energy at ground state. An orbiting electron can escape from the atom when given enough energy that is then termed as ionized. An atom can also absorb an atom from neighboring atoms. Between the atom and ion states, the electron ...Download file to see next pagesRead More
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