What is the nearest huge cluster of galaxies to our Local Group?
A) Coma Cluster
B) Centaurus Cluster
C) Virgo Cluster
D) Orion Nebula
E) Hercules Cluster
C
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A single slit forms a diffraction pattern with monochromatic light. The fourth minimum of the pattern occurs at an angle of 32° from the central maximum. The angle at which the fifth minimum of the pattern occurs is closest to:
A) 41.5° B) 41.0° C) 40.5° D) 42.0° E) 42.5°
The position of a particle as it moves along the x axis is given for t > 0 by x = (t3 ? 3t2 + 6t) m, where t is in s. Where is the particle when it achieves its minimum speed (after t = 0)?
a. 3 m b. 4 m c. 8 m d. 2 m e. 7 m
A stick is moving along the x-axis at 90%c. A person riding with the stick sees it inclined at 45.° with respect to the x-axis. Observers in the rest frame see the stick making what angle with respect to the x-axis?
A) 79.° B) 66.° C) 53.° D) 45.° E) 88.°
When a guitar is tuned to adjust it pitch, what is it that is changed?
A) The wavelength of the fundamental. B) The amplitude of the fundamental. C) The frequency of the fundamental.