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.
Learn more about radioactive decay brainly.com/question/9796067
#learnwithBrainly
Explanation:
Volcanoes. It is an impressive sight: two sides of land so visibly ripped apart. The Mid-Atlantic Ridge that is to blame runs through the whole of Iceland
Answer:
During the time of Pangaea most of the dry land on Earth was joined into one huch landmass that covered nearly a third of the planet's surface. The giant ocean that surrounded the continent is known as what?
Pangaea existed during what geological time periods, which were times of great change?
Most distributions of rocks within Earth's crust, including minerals, fossil fuels, and energy resources, are a direct result of the history of plate motions and collisions and the corresponding changes in the configurations of the continents and ocean basins. Research and explain how plate tectonics could account for these resources exactly.
North America has gradually grown in size over the past 4 billion years through a complex set of interactions with other continents, including the addition of many new crustal segments. What were these continents and what areas of the United States were created by new crustal segments exactly.
Answer:
Philippines Geography
Extending about 1,100 miles (1,770 km; north to south), its many islands (volcanic in origin) are mostly mountainous, with narrow coastal plains; many islands are covered by tropical rain forests.
Explanation:
