Well I am wrong the answer is A for that helps keep the environment clean
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
Shintoism is a purely Japanese religion, the origins of which are buried in the hazy mists of ancient Japanese history. It is one of the world’s oldest religions. The Japanese people have a fierce love for their land and believe that the Japanese islands were the very first divine creation. hope this helps. :)
The global winds are more likely to affect the warm ocean currents because they are surface currents, while the cold currents are deep.
Answer:
The altitude, latitude and availability of sunlight and water.
Explanation:
- There are various types of climatic effects that help geographers identify the plant life in a particular place as the altitude, latitude, and duration of sunshine, cloudiness, and amount of rainfall.
- There are certain types of biogeographical realms or ecozones on earth that influence the type of natural vegetation and are governed by their respective climates.
- Therese regions are also called as biomes. These regions are broadly classified by the type of biota and that is dependent on the availability of water and sunlight.
