Charge of uniform density (0.30 nC/m2) is distributed over the xy plane, and charge of uniform density (–0.40 nC/m2) is distributed over the yz plane. What is the magnitude of the resulting electric field at any point not in either of the two charged planes?
a. 40 N/C
b. 34 N/C
c. 28 N/C
d. 46 N/C
e. 6.0 N/C
Answer: c. 28 N/C
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Parallel Wires: Two long parallel wires that are 0.30 m apart carry currents of 5.0 A and 8.0 A in the opposite direction. Find the magnitude of the force per unit length that each wire exerts on the other wire and indicate if the force is attractive or repulsive. (?0 = 4? × 10-7 T ? m/A)
A. 2.7 × 10-5 N repulsive B. 7.2 × 10-5 N repulsive C. 3.4 × 10-5 N attractive D. 2.7 × 10-5 N attractive E. 7.2 × 10-5 N attractive
Water freezes at atmospheric pressure and a temperature of
A) 0 degrees Celsius. B) 32 degrees Fahrenheit. C) about 273 kelvin. D) all of the above E) none of the above
A person stands between two speakers driven by the same source. Each speaker produces a tone with a frequency of 200 Hz on a day when the speed of sound is 330 m/s. The person is 1.65 m from one speaker and 4.95 m from the other
What type of interference does the person perceive? A) constructive B) destructive C) both constructive and destructive D) neither constructive nor destructive
If the stable nuclei are plotted with neutron number vs. proton number, the curve formed by the stable nuclei does not follow the line N = Z. This is predicted by examining how the binding energy is influenced by:
a. the volume of the nucleus. c. the proton-neutron mass difference. b. the size of the nuclear surface. d. the Coulomb repulsion.