How much charge can be placed on a capacitor of plate area 20 cm2 with air between the plates before it reaches "atmospheric breakdown" where E = 3.0 × 10^6 V/m? (e0 = 8.85 × 10^-12 C2/N×m2)
a. 6.6 × 10^-7 C
c. 5.3 × 10^-8 C
b. 2.7 × 10^-8 C
d. 4.0 × 10^-7 C
C
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Polycrystalline MgO is brittle at room temperature because to maintain continuity with plastic strain in a polycrystalline material, there must be at least _________active slip systems.
Fill in the blank(s) with the appropriate word(s).
As a ball bounces from a floor, its acceleration off the floor between bounces is
A) significantly less than g. B) g. C) slightly more than g. D) significantly more than g.
How many neutrons are in a 15C nucleus?
A. 7 B. 8 C. 6 D. 9
Mathematical models indicate that ___________ galaxies are produced by high-speed collisions in which a smaller galaxy passes through another galaxy almost perpendicular to the disk of the galaxy
a. ring b. spiral c. antenna d. irregular e. tidal tail