Constellations are ________.
A. fixed patterns of stars on the celestial sphere
B. stars representing the path of the Sun through the sky
C. groups of stars that are close to each other in space
D. animals that look like groupings of stars
E. stars that neither rise nor set
Answer: A
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the magnetic field in the primed frame.
A. A B. B C. C D. D E. Toward the viewer F. Away from the viewer T. There is no field of this type.
Consider an experiment where we send monochromatic light to a distant screen through a single narrow slit. The distance between adjacent dark fringes in the diffraction pattern displayed on the screen (A) increases, (B) decreases, or (C) remains the same if, The width of the slit increases
A. Increases B. Decreases C. Remains the same
The stars in the halo of our galaxy are
a) not affected by reddening and extinction. b) in a very flat distribution. c) older and bluer than those in the disk. d) never in globular clusters. e) older and redder than those in the disk.
A circus performer stretches a tightrope between two towers. He strikes one end of the rope and sends a wave along it toward the other tower. He notes that it takes 0.8 s for the wave to travel the 20 m to the opposite tower. If one meter of the rope has a mass of 0.35 kg, find the tension in the tightrope.
What will be an ideal response?