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.
35 because 105 divided by 3 is 35
An atoll estuary serves as the term that used in referring to rising of sea level which do results to invasion of the river valley which produces a nearshore body of water of mixed as well as variable salinity.
- In an estuary, there us usually mixing of freshwater river or stream aa well as ocean.
This will result to<u> salty ocean</u> mixing with a freshwater river, and brackish water will be formed.
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Answer:
See explanation
Explanation:
Black Mesa - High Plains
Mount Scott - Ouachita Mountains
Rich Mountain - Wichita Mountains
Tallgrass Prairie Reserve - Sandstone Hills
Alabaster Caverns - Gypsum Hills
The Mekong river is one of the primary landforms in the South-east Asian peninsula wherein it stretches 4,200 km from Southern Cambodia to the north of Myanmar. In addition, the river system has been the source of transportation as well as fisheries in settlements surrounding it. The country where the river is not its primary water system would be Vietnam.
