Intrusive igneous rocks cool down from magma slowly because they form underneath the surface, that will make them have large crystals.
Extrusive igneous rocks cool down from lava rapidly because they form at the surface, so that will make them have small crystals.
Answer:
0
Explanation:
F1 = G•2.2•4.66/3² (pointed right)
F2 = G•2.2•4.66/3² (pointed left)
subtract the two to get zero
Answer: f=150cm in water and f=60cm in air.
Explanation: Focal length is a measurement of how strong light is converged or diverged by a system. To find the variable, it can be used the formula:
= (nglass - ni)( - ).
nglass is the index of refraction of the glass;
ni is the index of refraction of the medium you want, water in this case;
R1 is the curvature through which light enters the lens;
R2 is the curvature of the surface which it exits the lens;
Substituting and calculating for water (nwater = 1.3):
= (1.5 - 1.3)( - )
= 0.2()
f = = 150
For air (nair = 1):
= (1.5 - 1)( - )
f = = 60
In water, the focal length of the lens is f = 150cm.
In air, f = 60cm.
Newton thinks that object falls due to gravity whereas Einstein thinks gravity is not the reason behind it.
<h3>How did Einstein’s and Newton’s theories differ in terms of explaining the cause of gravity?</h3>
Newton concluded that objects fall because they are pulled by Earth's gravity. Einstein's thinks that these objects do not fall due to gravity. According to Einstein, these objects and Earth just freely move in a curved spacetime
So we can conclude that Newton thinks that object falls due to gravity whereas Einstein thinks gravity is not the reason behind it.
Learn more about gravity here: brainly.com/question/940770
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according to conservation of momentum , in absence of external forces , the total momentum of system of the particles remain same both before and after collision.
momentum of colliding objects before collision = momentum of colliding objects after collision.
or
m1 v1i + m2 v2i = m2 v1f + m2 v2f
where m1 and m2 are the two colliding objects. v1i and v2i are their respective initial velocities before collision and v1f and v2f are their respective final velocities after collision.
hence the correct statement is
total momentum before the collision is equal to the momentum after collision.