11460 years old is the answer.
The correct answer is option ''The stethoscope was invented because the physician did not want to put his head on women's chests to listen to their heart and lungs''.
In this case, the problem was that the physician's had a problem in listening the heart beats and the lung sound of the woman. To overcome this problem, the stethoscope was invented to listen the heart beat and the lung sound from distance, without keeping head on women's chest.
The acidity of the soil-peat inhabits diversity of plant species compared to marshes.
An important distinction to bogs would be that marsh soils are more typically neutral in the pH scale, to slightly more basic.
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1/2 of a radioactive substance will remain after 3 half lives.
Answer:
air, oxygen, water, sand. and tea
