The answer is B
second law
Answer:
14.57 ohms
Explanation:
Here in the figure ,Rb & R₄are in series & also Rc & R₅ are in series. As they are in series , ( Rb + R₄ ) & (Rc & R₅) are in parallel . So the equivalent resistance in that branch = ( 2 + 18 ) ║ ( 3 + 12 )
= 20 ║ 15
= (20×15) / (20 + 15)
= 8.57 ohms
Also Ra ( 6 ohm ) is in series with that branch ,. So the equivalent resistance of the whole circuit = 8.57 + 6 = 14.57 ohms.
Answer:
The coastal regions are affected by abrasion due to large volumes of water and increased winds. This can become more severe especially with storms that hit coastal regions.
Explanation:
Abrasion is physical weathering caused by water, wind and gravity. Hope it worked, I love geography! Can you mark mine as the brainliest please! Also can you give me a thanks and a 5 star vote!
<h2>5.3 km</h2>
Explanation:
This question involves continuous displacement in various directions. When it becomes difficult to imagine, vector analysis becomes handy.
Let us denote each of the individual displacements by a vector. Consider the unit vectors
as the unit vectors in the direction of East and North respectively.
By simple calculations, we can derive the unit vectors
in the directions North,
South of West and
North of West respectively.
So Total displacement vector = Sum of individual displacement vectors.
Displacement vector = ![4(\vec{j})+6(\frac{-\vec{i}-\vec{j}}{2})+5(\frac{-\frac{1}{2}\vec{i}+\frac{\sqrt{3}}{2}\vec{j}}{2})=-4.25\vec{i}+3.165\vec{j}](https://tex.z-dn.net/?f=4%28%5Cvec%7Bj%7D%29%2B6%28%5Cfrac%7B-%5Cvec%7Bi%7D-%5Cvec%7Bj%7D%7D%7B2%7D%29%2B5%28%5Cfrac%7B-%5Cfrac%7B1%7D%7B2%7D%5Cvec%7Bi%7D%2B%5Cfrac%7B%5Csqrt%7B3%7D%7D%7B2%7D%5Cvec%7Bj%7D%7D%7B2%7D%29%3D-4.25%5Cvec%7Bi%7D%2B3.165%5Cvec%7Bj%7D)
Magnitude of Displacement = ![|-4.25\vec{i}+3.165\vec{j}|=5.3km](https://tex.z-dn.net/?f=%7C-4.25%5Cvec%7Bi%7D%2B3.165%5Cvec%7Bj%7D%7C%3D5.3km)
∴ Total displacement = ![5.3km](https://tex.z-dn.net/?f=5.3km)
Answer:
The value is ![n = 1.081](https://tex.z-dn.net/?f=n%20%3D%201.081)
Explanation:
From the question we are told that
The speed of in a vacuum is ![c = 3.0 *10^{8} \ m/s](https://tex.z-dn.net/?f=c%20%3D%203.0%20%2A10%5E%7B8%7D%20%5C%20%20m%2Fs)
The speed of light in the material is ![v = c -0.075c = 0.925 c = 0.925 * 3.0*10^{8} = 2.775 *10^{8} \ m/s](https://tex.z-dn.net/?f=v%20%20%3D%20%20c%20-0.075c%20%3D%200.925%20c%20%3D%20%200.925%20%2A%203.0%2A10%5E%7B8%7D%20%20%3D%202.775%20%2A10%5E%7B8%7D%20%5C%20m%2Fs)
Generally the reflection of the material is mathematically represented as
![n = \frac{c}{v}](https://tex.z-dn.net/?f=n%20%3D%20%5Cfrac%7Bc%7D%7Bv%7D)
=> ![n = \frac{3.0*10^{8}}{2.775 *10^{8}}](https://tex.z-dn.net/?f=n%20%3D%20%5Cfrac%7B3.0%2A10%5E%7B8%7D%7D%7B2.775%20%2A10%5E%7B8%7D%7D)
=> ![n = 1.081](https://tex.z-dn.net/?f=n%20%3D%201.081)