At what distance from a point charge of 14 mC would the electrical potential be 4.2 × 10^4 V? (ke = 8.99 × 10^9 N×m2/C2)
a. 0.76 m
c. 3.0 m
b. 0.58 m
d. 1.7 m
C
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If a beam of blue light has a wavelength of 400 nm is emitted by an object moving away from you at 1% of the speed of light, what wavelength would you see from this light?
A) 396 nm B) 399 nm C) 400 nm D) 401 nm E) 404 nm
If the dielectric breakdown field in air is 3 × 10^6 V/m, what potential difference is involved with a 3 cm spark?
a. 1.0 × 10^8 V c. 9 × 10^4 V b. 9 × 10^6 V d. 1.0 × 10^10 V
Interstellar gas clouds may collapse to form stars if they
a. have very high temperatures. b. encounter a shock wave. c. rotate rapidly. d. are located near main sequence spectral type K and M stars. e. All of the other choices are correct.
A particle (m = 50 g, q = 5.0 ?C) is released from rest when it is 50 cm from a second particle (Q = ?20 ?C). Determine the magnitude of the initial acceleration of the 50-g particle.
A. 54 m/s2 B. 90 m/s2 C. 72 m/s2 D. 65 m/s2 E. 36 m/s2