Three large, parallel metal plates A, B, C, each of area …

Three large, parallel metal plates A, B, C, each of area  S = 0 . 0360   m 2  and separation  d = 0 . 600   m m  between neighboring plates, are shown in Fig. 2.1. The space between the plates A and B is filled with air, i.e.  ε A B = ε 0 , and the space between the plates B and C is filled with a material of dielectric constant  κ = 3 . 00 , i.e.  ε B C = 3 . 00 ε 0 . (a) What is the total capacitance of the system involving the three large, parallel metal plates? (b) If a  12 . 0   V  of electric potential difference is applied between plates A and C as shown in Fig. 2.1, what are the magnitudes of the electric fields between plates A and B and between B and C? If an electron at plate B is released from rest, (c) what is its speed when it reaches plate A? If two large, parallel metal plates G and H, each of area  S = 0 . 0360   m 2  and separation  d = 0 . 600   m m , is shown in Fig. 2.2. If half of the gap is filled with air and another half of gap is filled with a dielectric material of dielectric constant  κ = 3 . 00 , (d) what is the total capacitance of the system and (e) what are the electric energy in the portion of the capacitor filled with air and the electric energy in the portion of the capacitor filled with a material of dielectric constant  κ = 3 . 00 ? (Note: the charge of an electron is −1.60 × 10−19 C and the mass of an electron is 9.11 × 10−31 kg; and  1   m m = 10 – 3   m .) phys2426_t1_fig2.jpg

The leading producer of cell phone backup batteries, Progyny…

The leading producer of cell phone backup batteries, Progyny, has achieved great success because it produces high-quality battery backups that are not too expensive. Even so, another company that produces lower-quality batteries at the same price has also achieved some success, but not as much as Progyny. Also, in general, the price of backup batteries has declined because of economies of scale and learning. In addition, Progyny has added complementary assets, such as a carrying case. Considering all of these factors, the backup battery industry is most likely in the________ stage.