0.4% = 0.004
(1.5mg /1000g ) / 0.004 = 0.375ml
Answer:
A. comparing the fossil to other fossils found in rock layers in the same area
Explanation:
Relative dating is defined as the process of finding age of fossil in which a fossils approximate age is determined by comparing it to similar rocks or fossils of the same age.
In relative dating, scientist do not determine the exact age of the fossil but determine the relative age on the basis of the relevant rocks or fossils.
Hence, the correct answer is "A. comparing the fossil to other fossils found in rock layers in the same area".
The heat capacity of iron is 0.45J/g°C.
We calculate the heat using the equation:
ΔH = m cp ΔT
where
<span>m is the mass
ΔH is enthalphy or the heat required
cp is the heat capacity
</span><span>ΔT is the change in temperature
</span>So,
<span>ΔH = m cp ΔT = (125g) (0.45 J/g</span>°C) (75°C - 23.5<span>°C)
</span><span>ΔH = 2896.875 J
</span>
Dividing by 1000 to convert to kJ,
<span>ΔH = 2.897 kJ</span>
It is true because the sun rays hit towards the equator creating warm temperatures near the equator then the poles
Answer:
100 teragrams of nitrogen per year
Explanation:
Nitrogen fixation in Earth's ecosystems is defined as a process where by nitrogen in air is transformed into ammonia or other related nitrogenous compounds. Generally, atmospheric nitrogen is referred to as molecular dinitrogen and it is a nonreactive compound that is metabolically useless to all but a few microorganisms. This process is vital to life due to the fact that inorganic nitrogen compounds are needed for the biosynthesis of amino acids, protein, and all other nitrogen-containing organic compounds. Thus, the natural rate of nitrogen fixation in Earth's ecosystems is 100 tetragrams of nitrogen per year.
