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Answer:
Longitudinal waves have particle movement parallel to the direction of the energy.
Explanation:
A type of wave in which the particles in the medium move parallel to the direction of the propagation of the wave is known as a longitudinal wave. A sound wave traveling through air is an example of a longitudinal wave. Here, the particles vibrate back and forth in a direction parallel to the energy transport.
A type of wave in which the medium's particle movement is perpendicular to the direction of the propagation of the wave (or the direction of the energy transport) is known as a transverse wave. Transverse waves and longitudinal waves can travel through a solid medium. Longitudinal waves can travel through fluid mediums (liquid or gas) like air or water while transverse waves require a relatively rigid medium to transmit their energy.
Earthquakes generate both transverse and longitudinal waves that travel through the earth's solid structures. Only longitudinal waves can travel through the earth's core. An electromagnetic wave is produced by the vibration of charged particles and can transmit its energy through a vacuum. An example is light waves.
Answer:
<em>The one of the worst infectious disease outbreaks in history was cholera.</em>
Explanation:
<em>The USA had three serious epidemies of cholera, which is an intestinal infection. It happened between 1832 and 1866, the pandemic began in India, and swiftly spread across the globe through trade routes. New York City was usually the first city to be infected. They estimated that two to six americans died per day during the outbreak. The end of cholera's outbreak is unclear, but researchers believe that it was related to quarantines or climate changes. The last cholera outbreak in USA was in 1911, the scientists found out that the effective treatment included antibiotics, zinc supplementation and rehydration.</em>
<em>Nowadays, 130.000 people dies every year all over the globe because of the disease. It has not been erradicated yet, but with modern sewage and water treatment, some countries are cholera free now. Unfortunately, some african countries and other underdeveloped countries still have the virus present there.</em>
<em>So the CDC recommends vaccines for those who intend to travel to high risk areas, and to wash hands regularly with soap and water, and only drinking mineral bottled water.</em>
Answer:
23 chromosomes
Explanation:
gametes has 23 chromosomes.
