X-rays are types of electromagnetic radiation that is performed to take images inside the human body. A protective vest functions as a radiation shield. The vest is in the shape of a hospital apron, and it is made up of an outer thin rubber, and an inner lead. Wearing a protective vest during an x-ray helps to reduce the exposure of the patient’s vital organs to ionizing radiation.
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Until the 1600s, people who investigated problems related to our understanding of the natural world were called philosophers.
Later on, that term changed, and got its contemporary meaning of philosophers.
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Facilitated diffusion
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