If the current in the 4.0-? resistor is 1.4 A, what is the magnitude of the potential difference, VA ? VB?
a.
69 V
b.
55 V
c.
62 V
d.
48 V
e.
31 V
d
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In a thermodynamic process, the internal energy of a system in a container with adiabatic walls decreases by 800 J. Which statement is correct?
A. The system lost 800 J by heat transfer to its surroundings. B. The system gained 800 J by heat transfer from its surroundings. C. The system performed 800 J of work on its surroundings. D. The surroundings performed 800 J of work on the system. E. The 800 J of work done by the system was equal to the 800 J of heat transferred to the system from its surroundings.
The dielectric strength of rutile is 6.0 × 10^6 V/m, which corresponds to the maximum electric field that the dielectric can sustain before breakdown. What is the maximum charge that a 10?10-F capacitor with a 1.08-mm thickness of rutile can hold?
a. 1.7 nC b. 0.65 µC c. 0.32 mC d. 6.5 C e. 60 nC
According to Wien's displacement law, if the absolute temperature of a radiating blackbody is doubled, then the peak wavelength emitted will change by what factor?
a. 4 c. 1 b. 2 d. 1/2
The moment magnitude scale measures the energy released by an earthquake. For each increase in magnitude, the energy released increases
A) ten-fold. B) logarithmically. C) by 10. D) 30 times.