Answer:
![v=1.92m/s](https://tex.z-dn.net/?f=v%3D1.92m%2Fs)
Explanation:
Given data
Length h=2.0m
Angle α=25°
To find
Speed of bob
Solution
From conservation of energy we know that:
![P.E=K.E\\mgh=(1/2)mv^{2}\\ gh=(1/2)v^{2}\\v^{2}=\frac{gh}{0.5}\\ v=\sqrt{\frac{gh}{0.5}}\\ v=\sqrt{\frac{(9.8m/s^{2} )(2.0-2.0Cos(25^{o} ))}{0.5}}\\v=1.92m/s](https://tex.z-dn.net/?f=P.E%3DK.E%5C%5Cmgh%3D%281%2F2%29mv%5E%7B2%7D%5C%5C%20gh%3D%281%2F2%29v%5E%7B2%7D%5C%5Cv%5E%7B2%7D%3D%5Cfrac%7Bgh%7D%7B0.5%7D%5C%5C%20v%3D%5Csqrt%7B%5Cfrac%7Bgh%7D%7B0.5%7D%7D%5C%5C%20v%3D%5Csqrt%7B%5Cfrac%7B%289.8m%2Fs%5E%7B2%7D%20%29%282.0-2.0Cos%2825%5E%7Bo%7D%20%29%29%7D%7B0.5%7D%7D%5C%5Cv%3D1.92m%2Fs)
Answer:
a.) ![V=5283.2 \ V](https://tex.z-dn.net/?f=V%3D5283.2%20%5C%20V)
b.) ![V=4064\ V](https://tex.z-dn.net/?f=V%3D4064%5C%20V)
Explanation:
<u>Electric Field and Potential Difference</u>
There are several conditions that must be met for a spark to be created into an air gap. Once the physical conditions are fixed, a minimum electric field is necessary for the spark to be initiated. Let s be the separation between the electrodes and V their potential difference. The electric field is
a.)
![\displaystyle E=\frac{V}{s}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20E%3D%5Cfrac%7BV%7D%7Bs%7D)
Solving for V
![V=E.s](https://tex.z-dn.net/?f=V%3DE.s)
The separation is
![s= 5.5\cdot 10^{-2}\ in=0.001651 \ m](https://tex.z-dn.net/?f=s%3D%205.5%5Ccdot%2010%5E%7B-2%7D%5C%20in%3D0.001651%20%5C%20m)
Thus the potential difference is
![V=3.2\cdot 10^{6}\ V/m\times 0.001651 \ m](https://tex.z-dn.net/?f=V%3D3.2%5Ccdot%2010%5E%7B6%7D%5C%20V%2Fm%5Ctimes%200.001651%20%5C%20m)
![V=5283.2 \ V](https://tex.z-dn.net/?f=V%3D5283.2%20%5C%20V)
b.) If the separation was greater, the applied voltage needs to be greater if the electric field has to be constant. One possible measure to keep electrodes as close as possible is to build them as sharp edges. It gives the spark an easier path to travel to.
If the separation is 0.05 inches =0.00127 m
![V=3.2\cdot 10^{6}\ V/m\times 0.00127 \ m](https://tex.z-dn.net/?f=V%3D3.2%5Ccdot%2010%5E%7B6%7D%5C%20V%2Fm%5Ctimes%200.00127%20%5C%20m)
![V=4064\ V](https://tex.z-dn.net/?f=V%3D4064%5C%20V)
Answer:
<u>Copper ( II ) chloride </u>
Explanation:
<em>According to the nomenclature , </em>
- <em>The metal ion name is followed by the non-metal ion</em>
- <em>The oxidation state of the metal is to be mentioned in the brackets .</em>
- <em>As
has two
ions , and the net charge on the compound is zero , the charge on copper is :</em>
![Cu^{x}+2Cl^-=0\\x-2=0\\x=2+](https://tex.z-dn.net/?f=Cu%5E%7Bx%7D%2B2Cl%5E-%3D0%5C%5Cx-2%3D0%5C%5Cx%3D2%2B)
thus ,
⇒![Cu^{2+}](https://tex.z-dn.net/?f=Cu%5E%7B2%2B%7D)
∴ ,
The proper nomenclature is :
Copper ( II ) chloride