The light curve of a large Cepheid variable would typically show pulsations in luminosity ________.
A. every 6 minutes
B. every 6 years
C. every 6 months
D. every 6 hours
E. every 60 days
Answer: E
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A 1.500 m long uniform beam of mass 30.00 kg is supported by a wire as shown in the figure. The beam makes an angle of 10.00 degrees with the horizontal and the wire makes and angle of 30.00 degrees with the beam. A 50.00 kg mass, m, is attached to the end of the beam. What is the tension in the wire?
A. 2,034 N
B. 1,855 N
C. 1,435 N
D. 1,255 N
E. 1,035 N
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Answer the following statement true (T) or false (F)
Briefly describe how the solar wind affects magnetospheres and how aurora are produced
What will be an ideal response?
A person with normal eyesight uses a converging lens of focal length 10 cm as a magnifying glass to finish an engraving job. To see detail, he holds the lens very close to his eyes. At what minimum distance from the job must he hold the lens?
A) 20 cm B) 30 cm C) 14 cm D) 9.4 cm E) 7.1 cm