Charge stored in a capacitor given by Q = C*V.
So, C = Q / V.
V=30V, Q=0.003C
C = 0.0001F or 100μF
i thinkits an instrument called seismograph. not sure
Explanation:
It is given that,
Mass of the woman, m₁ = 52 kg
Angular velocity, ![\omega=0.47\ rev/s=2.95\ rad/s](https://tex.z-dn.net/?f=%5Comega%3D0.47%5C%20rev%2Fs%3D2.95%5C%20rad%2Fs)
Mass of disk, m₂ = 118 kg
Radius of the disk, r = 3.9 m
The moment of inertia of woman which is standing at the rim of a large disk is :
![I={m_1r^2}](https://tex.z-dn.net/?f=I%3D%7Bm_1r%5E2%7D)
![I={52\times 3.9^2}](https://tex.z-dn.net/?f=I%3D%7B52%5Ctimes%203.9%5E2%7D)
I₁ = 790.92 kg-m²
The moment of inertia of of the disk about an axis through its center is given by :
![I_2=\dfrac{m_2r^2}{2}](https://tex.z-dn.net/?f=I_2%3D%5Cdfrac%7Bm_2r%5E2%7D%7B2%7D)
![I_2=\dfrac{118\times (3.9)^2}{2}](https://tex.z-dn.net/?f=I_2%3D%5Cdfrac%7B118%5Ctimes%20%283.9%29%5E2%7D%7B2%7D)
I₂ =897.39 kg-m²
Total moment of inertia of the system is given by :
![I=I_1+I_2](https://tex.z-dn.net/?f=I%3DI_1%2BI_2)
![I=790.92+897.39](https://tex.z-dn.net/?f=I%3D790.92%2B897.39)
I = 1688.31 kg-m²
The angular momentum of the system is :
![L=I\times \omega](https://tex.z-dn.net/?f=L%3DI%5Ctimes%20%5Comega)
![L=1688.31 \times 2.95](https://tex.z-dn.net/?f=L%3D1688.31%20%5Ctimes%202.95)
![L=4980.5\ kg-m^2/s](https://tex.z-dn.net/?f=L%3D4980.5%5C%20kg-m%5E2%2Fs)
So, the total angular momentum of the system is 4980.5 kg-m²/s. Hence, this is the required solution.
<span>the heated filament will react with the oxygen in the air but now with the argon, which is a noble gas and hardly ever reacts.</span>