Explanation:
we can protect soil quality by the following ways:
1.plantation should be done.
2.chemicals should not be used.
3.using earthworm in the field as it makes the soil fertile
4.construction of dams should be made which prevents soil erosion.
hope u get it!
The answer is places and regions
Answer:
The current amount of the Potassium-40 sample is approximately 37.521 grams.
Explanation:
The amount of the sample of the radioactive isotope decays exponentially in time, the amount of mass of the sample as a function of time (
), in grams, is described below:
(1)
Where:
- Initial mass, in grams.
- Time, in years.
- Time constant, in years.
The time constant can be found from half life (
), in years, described in statement:
(2)
If we know that 
, 
and 
, then the current amount of the sample is:
The current amount of the Potassium-40 sample is approximately 37.521 grams.
<span>The origin of the Sudan civil war lies in the conflict between the Muslim Arabs and Christian animists. Until 1946, the British government, in collaboration with the Egyptian government administered south Sudan and north Sudan as separate regions.Southern Sudan is inhabited primarily by Christians and animists while most of the north is inhabited by Muslims who were culturally Arabic. The Sudan civil war resulted from conflict between these two groups.</span>
<span> </span>
Answer:
<h2><em><u>B</u></em><em><u>.</u></em><em><u> </u></em><em><u>Mercury</u></em></h2>
Explanation:
The planets <em><u>Mercury and Venus </u></em> don't have a natural satellite.
