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liraira [26]
3 years ago
5

Infectious agents that cause disease are called:

Geography
1 answer:
irga5000 [103]3 years ago
7 0

Answer:

pathogens is the correct answer.

Explanation:

A pathogen is an infectious agent that causes diseases.

Examples of pathogens that cause disease are bacteria, protozoa, fungi, helminths, viruses, and protozoa.

when pathogens enter the host body through nose, eyes, bites, mouth and it destructs the host immune system that causes infectious disease.

diseases caused by infectious agents are cholera, dysentery, tuberculosis, bubonic plague, typhoid, and pneumonia, etc.

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The distance from Alexandria to Syene is about 500 miles. On the summer solstice the sun is directly overhead at noon in Syene.
svp [43]

Answer:

Earth circumference is 25000 miles

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Explanation:

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He observe on a particular time of day ( in noon) during the summer solstice

and there was no shadow in Syene in Egypt so  This was verified that the sun must be directly on overhead and not at an angle to the surface of the city at that time

so

In Alexandria he measured the position of sun at the same time and found it to be nearly (1/50)th of a complete circle

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and we have given 500 miles

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Earth circumference = 500 × 50

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correct option is 25,000 miles

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