A 10-? resistor is in series with a 100-?F capacitor at 120 Hz. What is the phase angle?
A) -37° B) -82° C) +37° D) -53° E) -4.7°
D
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A metal sphere of radius 2.0 cm carries an excess charge of 3.0 ?C. What is the electric field 6.0 cm from the center of the sphere? (k = 1/4??0 = 9.0 × 109 N ? m2/C2 )
A) 6.4 × 106 N/C B) 5.7 × 106 N/C C) 4.2 × 106 N/C D) 7.5 × 106 N/C E) 9.3 × 106 N/C
Which of the following is NOT a possible value for the electric charge on an object?
A) 8 x 10-20 C B) 8 x 10-19 C C) 8 x 10-18 C D) 8 x 10-17 C E) 8 x 10-16 C
In the x-ray chemical analysis of the stainless-steel specimen in Figure 15.11, the Cr K? line with a wavelength of 0.2291 nm occurs at 99 degrees. What is the interplanar spacing of the crystal used in this wavelength dispersion experiment?
What will be an ideal response?
How is 21 cm radiation produced?
What will be an ideal response?