Tensile train is
A) the ratio of the change in length to the original length.
B) the stress per unit area.
C) the same as force.
D) the applied force per cross-sectional area.
E) the ratio of stress to elastic modulus.
A
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Charge of uniform density (40 pC/m2) is distributed on a spherical surface (radius = 1.0 cm), and a second concentric spherical surface (radius = 3.0 cm) carries a uniform charge density of 60 pC/m2 . What is the magnitude of the electric field at a point 2.0 cm from the center of the two surfaces?
a. 1.1 N/C b. 4.5 N/C c. 1.4 N/C d. 5.6 N/C e. 0.50 N/C
At the North Pole, the summer solstice Sun ________.
A. rises north of east and sets north of west B. circles the pole along the horizon C. is directly overhead for the entire day D. circles the pole 23.5 degrees below the horizon E. circles the pole 23.5 degrees above the horizon
Light of wavelength 418 nm is incident on a slit of width 0.35 mm, and a diffraction pattern is produced on a screen that is 2.4 m from the slit. What is the distance of the second dark fringe from the center of the bright fringe? (1 nm = 10?9 m)
a. 2.9E–7 m b. 5.7E–3 m c. 1.6E–3 m d. 1.4E–6 m e. 1.1E–6 m
A galvanometer can be converted to an ammeter by the addition of a
A) small resistance in parallel. B) large resistance in parallel. C) small resistance in series. D) large resistance in series.