Spectral Series: What is the shortest wavelength in the Balmer series?
A. 328 nm
B. 365 nm
C. 456 nm
D. 656 nm
E. 820 nm
Answer: B
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Addition by 1. Components: Vector 
has a magnitude of 6.0 m and points 30° north of east. Vector 
has a magnitude of 4.0 m and points 30° east of north. The resultant vector 
+ 
is given by
A. 0.70 m at an angle of 42° north of east. B. 14 m at an angle of 42° north of east. C. 1.1 m at an angle of 42° north of east. D. 9.7 m at an angle of 42° north of east. E. 2.0 m at an angle of 42° north of east.
An induced emf is produced in
A. a closed loop of wire when it remains at rest in a nonuniform static magnetic field. B. a closed loop of wire when it remains at rest in a uniform static magnetic field. C. a closed loop of wire moving at constant velocity in a nonuniform static magnetic field. D. all of the above. E. only (b) and (c) above.
A uniform rod (length = 2.0 m) is mounted to rotate freely about a horizontal axis that is perpendicular to the rod and that passes through the rod at a point 0.50 m from one end of the rod. If the rod is released from rest in a horizontal position, what is the angular speed of the rod as it rotates through its lowest position?
a. 3.5 rad/s b. 3.8 rad/s c. 4.1 rad/s d. 2.0 rad/s e. 5.6 rad/s
The contemporary explanation of the big bang states that early profound changes happened incredibly fast, sometimes in fractions of a second, at multibillion-degree temperatures.
a. true b. false