<span>The number of live births per 1,000 people in a year is known as the Crude birth rate!
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Answer:
Heart will beat 140 times in 2 minutes.
Heart beats at a rate of 70 beats per minute.
Explanation:
In 0 minutes heart beats 700 times
hence in 1 minute it will beat <span><span>70010</span>=70</span> times
and heart will beat 140 times in <span><span>14070</span>=2</span> minutes
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
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Answer: economic activity map,climate map, physical map, population map, and then political map.
Explanation:
edmentum
Answer:
The invention of the telescope made it easier to see that there were actually more bodies within the universe than was originally thought.
Explanation:
This is because telescopes allowed us to see bodies within the universe that couldn't be seen with naked eye. This improved significantly our understanding of Earth's place in the cosmos and sparked the beginning of a revolution in the field of Physics.
