The middle or centre of the Earth is the core. However the middle of the layers from the surface to the centre of the Earth is known as mantle.
Answer: B. bending light
Explanation:
The phenomenom of vision in human eye is thanks to refraction (when light changes its direction as it passes through one medium to another), and this is what the cornea and the lens do.
When the ray of light encounters the eye, the first thing it finds is the <u>cornea</u>, which<u> bends this ray and begins to form an image</u>, then light passes through the <u>pupil</u>, which is in charge of regulating the amount of light that enters in the eye.
After light travels through pupil it passes through the <u>lens</u>, where <u>the rays of light change the direction again in order to focus the formed image on the retina.
</u>
At this point it is important to note the formed image is downward, then the retina transforms light into electrical impulses that are sent to the brain through the optic nerve and finally the brain interprets these messages, and forms a right upward image.
In the image attached these parts can be seen.
The answer is Entropy or part C.
Entropy is basically a thermodynamic quantity that tells the randomness of a system or as said in the question tells us a measure of the disorder of the system.
The second law of thermodynamics states that a closed system has entropy which may remain constant or otherwise might increase.
It is basically the measure of the change of a system or universe when it goes from order to disorder.
Answer:


Explanation:
given,
mass of asteroid 1 = M
mass of asteroid 2 = 2M
radius of two asteroid = R
Distance between the asteroid = 10 R
Speed of the asteroid before collision = ?
using conservation of momentum
M u + 2M u' = M v₁ + 2 M v₂
initial speed of asteroid is equal to zero
0 = v₁ + 2 v₂
v₁ = -2 v₂
using conservation of momentum
initial potential energy is converted into potential energy and the kinetic energy of both the asteroids.




now,


hence, the velocity of asteroid are

