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Answer:
The waves must be coherent and monochromatic
Answer: 80
Explanation: The atomic number is the number of protons in an atom's nucleus. Since mercury has an atomic number of 80 it has 80 protons.
Black death, also known as the bubonic plague was one of the worst pandemics that ever happened, killing around 1/3 of Europe's population. It spread to Europe in the mid 1300's from China.
Black death victims were treated through magic, witchcraft, prayer and other methods. As for the two other options, they used medicine, but not antibiotics and radiation hadn't been discovered yet (it was discovered in the 1900's)
Answer:
Chloroplasts.
Explanation:
One of the most important characteristics of plants is their ability to conduct photosynthesis meaning to make their own food by converting light energy into chemical energy. This process occurs in almost all plant species and is carried out in specialized organelles known as chloroplasts.
