What is Kirchhoff’s 1st equation for this junction?
a.
I1 = I2 + I3
b.
I2 = I1+ I2
c.
I3 = I1 + I2
d.
I1 + I2 + I3 = 0
d
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Parallel-Plate Capacitor: Two parallel square metal plates, 8.4 cm on each side, are 2.5 mm apart and carry equal but opposite charge uniformly distributed over their facing surfaces. How much excess charge is there on each plate if the electric field between the plates has a magnitude of 2.0 × 106 N/C? (k = 1/4??0 = 8.99 × 109 N ? m2/C2)
Fill in the blank(s) with the appropriate word(s).
The change in entropy of a mass m of a solid substance which has a latent heat of fusion LF and melts at a temperature T is
A. LFT/m B. mLFln(T) C. mLFT D. mLF/T E. LF/mT
Resolution: With what color light would you expect to be able to see the finest detail when using a microscope?
A. red, because of its long wavelength B. yellow, because of its intermediate wavelength C. blue, because of its shorter wavelength D. The color does not matter.
The natural background radiation we personally encounter is
A) a trace amount. B) about a quarter. C) about half. D) more than half.