Answer:
science is define as the study of physics, chemistry, biology, geology and astronomy. science is very important in our daily life.we study science for knowing the knowledge about biological and chemical and many other aspects.without science it is impossible to live our daily life.science is used in each and every steps.
Explanation:
There are many more benefits that we are getting and going to get . Science has already discovered many things ,that we didn't expect efore.And also in progress to discover new things.Science has developed a new type of antivirus that protect us from different virus.Has made different medicine that recover a people. So it is very useful in our life.
Upper mantle
The theory of the plate tectonics uses the convection cells in the upper mantle layer as the foundation for the movement of the continents.
To put it simple the process is explained like the convection cells create a lot of pressure, that pressure, supported by the high temperatures and magma, influence the crust above, and manage to crack it on certain places. As the crust cracks, it becomes a separate entity, and under the enormous force from bellow it slowly moves into a particular direction, and that is actually the movement of the tectonic plates.
Answer:
Mercury is the planet nearest the Sun and is the most difficult to observe, because it is always quite close to the Sun in the sky. Because of its orbital motion, it appears to swing back and forth around the Sun, reaching a maximum angular distance of about 28°.
Explanation:
I hope that helps you
Answer:
0.002
Explanation:
The half-life of the radioactive nucleus is related to its quantity, by the following equation:
<u>Where:</u>
<em>N(t): is the quantity of the radioactive nucleus at time t</em>
<em>N₀: is the initial quantity of the radioactive nucleus</em>
<em>t: is the time = 4.5x10⁹ years</em>
<em>t(1/2): is the half-life of the radioactive nucleus = 5x10⁸ years</em>
Therefore, the fraction of the radioactive element in the rock today is 0.002.
I hope it helps you!
A) it has a net force because we know that it’s going down in a direction, so there is no force being cancelled out.
