Answer:
The correct answer is option D, Unconfined aquifers are found between two layers of impermeable soil or rock.
Explanation:
An unconfined aquifer is not confined by rock layer on both of its side. Usually the ground water level (GWL) is considered as the upper layer of unconfined aquifer. Also the rocky layer found on the other side of the unconfined aquifer is not impermeable as the major source of recharge of unconfined aquifer is the seepage of water through is permeable layer or through rain.
A person who specializes in the study of animals is called a zoologist. Zoologists who study certain kinds of animals have their own names.
Answer:
![\boxed{\sf A. \ 51 \ mL}](https://tex.z-dn.net/?f=%20%5Cboxed%7B%5Csf%20A.%20%5C%2051%20%5C%20mL%7D%20)
Explanation:
Amount of water displaced by the sphere will be equal to the volume of complete sphere.
As the sphere completely sinks to the bottom of the cup.
We have been given;
Diameter of sphere (d) = 4.6 cm
So,
![\sf Radius \: of \: sphere \: (r) = \frac{Diameter \: of \: sphere \: (d)}{2} \\ \sf = \frac{4.6}{2} \\ \sf = 2.3 \: cm](https://tex.z-dn.net/?f=%20%5Csf%20Radius%20%5C%3A%20%20of%20%5C%3A%20%20sphere%20%20%5C%3A%20%28r%29%20%3D%20%20%5Cfrac%7BDiameter%20%5C%3A%20%20of%20%5C%3A%20%20sphere%20%5C%3A%20%28d%29%7D%7B2%7D%20%20%5C%5C%20%20%5Csf%20%3D%20%20%5Cfrac%7B4.6%7D%7B2%7D%20%20%5C%5C%20%5Csf%20%20%3D%202.3%20%5C%3A%20cm)
Volume of sphere (V):
![\boxed{ \bold{V = \frac{4}{3} \pi {r}^{3} }}](https://tex.z-dn.net/?f=%20%5Cboxed%7B%20%5Cbold%7BV%20%3D%20%20%5Cfrac%7B4%7D%7B3%7D%20%5Cpi%20%7Br%7D%5E%7B3%7D%20%7D%7D)
By substituting value of r we get:
![\sf \implies V = \frac{4}{3} \times \pi \times {(2.3)}^{3} \\ \\ \sf \implies V = \frac{4}{3} \times 3.14 \times 12.167 \\ \\ \sf \implies V = \frac{152.81752}{3} \\ \\ \sf \implies V = 50.94 \: {cm}^{3} \\ \\ \sf \implies V \approx 51 \: {cm}^{ 3}](https://tex.z-dn.net/?f=%20%5Csf%20%5Cimplies%20V%20%3D%20%20%5Cfrac%7B4%7D%7B3%7D%20%20%5Ctimes%20%5Cpi%20%5Ctimes%20%20%7B%282.3%29%7D%5E%7B3%7D%20%20%5C%5C%20%20%5C%5C%20%20%5Csf%20%5Cimplies%20V%20%3D%20%20%5Cfrac%7B4%7D%7B3%7D%20%20%5Ctimes%203.14%20%5Ctimes%2012.167%20%5C%5C%20%20%5C%5C%20%5Csf%20%5Cimplies%20V%20%3D%20%20%20%20%5Cfrac%7B152.81752%7D%7B3%7D%20%5C%5C%20%20%5C%5C%20%20%20%5Csf%20%5Cimplies%20V%20%3D%20%2050.94%20%5C%3A%20%20%7Bcm%7D%5E%7B3%7D%20%20%5C%5C%20%20%5C%5C%20%20%20%5Csf%20%5Cimplies%20V%20%20%5Capprox%2051%20%5C%3A%20%20%7Bcm%7D%5E%7B%203%7D%20)
1 cm³ = 1 mL
![\therefore](https://tex.z-dn.net/?f=%20%5Ctherefore)
V = 51 mL
So,
Water displaced by the sphere = 51 mL
The brain region identified lighting up during an fMRI scan in a patient with obsessive-compulsive disorder is the anterior cingulate cortex. The anterior cingulate cortex is part of the limbic system and is responsible for the emotion formation, memory, processing, compulsions and obsessions, and others.