A radioactive element with a half-life of 1,000 years, and starting mass of 20 grams, will need 2,000 years to decrease to 5 grams.
Explanation:
The radioactive elements all have a specific half-life. Each element's half-life is well known, and they are used by scientists of numerous fields as they are excellent for determining the age of a particular item, be it or organic or non-organic nature. In this case, we have a radioactive element with a half-life of 1,000 years, and starting mass of 20 grams.
The half-life basically means that half of the mass of an element is lost during a particular period of time. For the element in question we need to find out how much time will be needed for it to decrease to 5 grams. In order to get to the result, we just need to add 1,000 years on every decrease of half of the mass:
20/2 = 10
10/2 = 5
So in 1,000 years, the element in question will decrease to 10 grams, and in further 1,000 years (2,000 cumulatively) it will decrease to 5 grams.
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AnswerClimate plays a major role in the distribution of the world's large-scale ecosystems. ... For example, Tropical rainforests have the greatest amount of biodiversity on earth because they have a warm, constant temperature, lots of sunlight and high levels of moisture (equatorial climate).
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Explanation:
Answer:
The cultural landscape of Dar es Salaam is a composite of several different culture groups which have administered the place. British policy stimulated the development of a district of 3 to 4 storey apartments reminiscent of Bombay.
Explanation:
Dar es Salaam is a city in Tanzania, it is very populous and has been inhabited by several different cultural groups. Its name means "House of Peace" and jpa became the capital of Tanzania. The different peoples who lived in that city generated a strong cultural diversity and an even greater population. This caused British policy (which dominated this place for a while) to create a project that enabled the development of apartments with 3 to 4 floors. This changed the visual identity of the region and made it look like Bombay.
Answer:
you're awesome
Explanation:
this made my day, thank you
The farther away you get from the equator, the colder it gets
