The reason why some igneous rocks are smooth and some are coarse is the manner in which they formed. We can simply divide the igneous rocks into intrusive and extrusive ones.
The intrusive igneous rocks are formed deep into the ground. The magma that has formed this rocks has been exposed to higher temperatures and pressures. That has led to a very slow cooling off of the magma. Because the magma has been cooling off slowly, the crystals had time and the right conditions to grow larger, thus making the intrusive igneous rocks coarse.
The extrusive igneous rocks are formed on the surface. They have been formed by the lava that once it come out on the surface has been exposed to much lower temperatures and pressures. That has led to very quick cooling off of the lava. Because the lava has cooled off quickly, the crystals didn't had time to grow in size, thus they have remained very small, almost unnoticeable, thus making the extrusive igneous rocks smoother.
The answer is A. Convert !
Answer:
C. π(5²)13 + 1/3π(5²)12 cubic units
Explanation:
The composite figure is made up of a cylinder and a cone.
The volume of the composite figure = volume of the cylinder + volume of the cone
For the CYLINDER:
Volume = πr²h
h = height of the cylinder = 13units
r = radius of the cylinder = 5units
Volume = π(5²)13 cubic units
For the CONE:
Volume of a cone = 1/3πr²h
height of the cone = 25-13 = 12units
Radius of the cone = radius of the cylinder = 5units
Volume = 1/3π(5²)12 cubic units
Volume of the composite figure will give: π(5²)13 + 1/3π(5²)12 cubic units
C
Since the components in a mixture are NOT chemically bound, you cannot use chemical methods to separate them lest you’ll counter-intuitively mix them chemically to form compounds. Rather physical methods are used to separate the components.
Explanation:
Air is made of a mixture of gases like Nitrogen, Oxygen and Carbon dioxide and particles like dust particles and water vapor. It is a homogeneous mixture because the components are well mixed up proportionately through out the mixture. The different components air can be separated using their different densities or melting and boiling points.
Learn More:
For more on mixtures and compounds check out;
brainly.com/question/3068841
brainly.com/question/11213250
#LearnWithBrainly