Rocks are broken down into smaller pieces by the process of weathering and erosion.
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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.
Answer:
white dwarf
Explanation:
White dwarf
In a white dwarf due to high temperature and pressure the electrons of atoms are compressed to a very small space and this makes it impossible to add more electrons in the space as all the energy levels are previously filled and thus the electrons exerts a pressure which acts against the compressive force of the gravity in a white dwarf .
hence , the correct option is white dwarf .
Answer:
This is because despite being the largest city in the country, New York City only has around 6% of the total U.S. population when its metropolitan area is taken into account.
A primate city, on the contrary, is a city that has 20%, 30% or even 40% of the total population of the country, regardless of how much larger it is than the second city.
Answer:
2
Explanation:
3 is physical 4 is as well so it has to be 1 or 2
