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

Physics & Space Science

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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

Physics & Space Science

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

Physics & Space Science

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?

Physics & Space Science

How is 21 cm radiation produced?

What will be an ideal response?

Physics & Space Science