C.
Hope this helps good luck
Answer: Sound wave can be described by five characteristics Wavelength , amplitude, time period, frequency and velocity or speed
Explanation:
Answer:
0.92 μC
Explanation:
In a parallel-plate capacitor, the electric field formed is equal to the charge density divited by the vacuum permisivity e0, as there are no dielectric between the plates. e0 is equal to 8.85*10^-12 C^2/Nm^2. The charge density is the total charge of each individual plate divided by its area. Then, the maximum charge allowed will be equal to:
![E = \frac{o}{e_0} = \frac{Q}{Ae_0} \\ Q = E*A*e_0 = 3*10^6 N/C * (0.25*\pi *(0.21m)^2)*8.85*10^{-12}C^2/Nm^2 = 9.196 *10^{-7} C](https://tex.z-dn.net/?f=E%20%3D%20%5Cfrac%7Bo%7D%7Be_0%7D%20%3D%20%5Cfrac%7BQ%7D%7BAe_0%7D%20%5C%5C%20Q%20%3D%20E%2AA%2Ae_0%20%3D%203%2A10%5E6%20N%2FC%20%2A%20%280.25%2A%5Cpi%20%2A%280.21m%29%5E2%29%2A8.85%2A10%5E%7B-12%7DC%5E2%2FNm%5E2%20%3D%209.196%20%2A10%5E%7B-7%7D%20C)
or 0.92 μC