Semiconductor technology has been the basis for many new electronic devices
a. True
b. False
Indicate whether the statement is true or false
True
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From what part of the H-R diagram have the giants in a star cluster evolved?
What will be an ideal response?
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
At present, what is the primary way that astronomers carry out SETI programs (that is, search for extraterrestrial intelligence)?
A) by using radio telescopes to search for signals from extraterrestrial civilizations B) by analyzing the spectra of extra-solar planets in an attempt to detect oxygen C) by searching for planets around distant stars D) by using X-ray telescopes to search for signals from extraterrestrial civilizations E) by analyzing high-resolution images of nearby stars in search artificial structures
A laser beam (? = 694 nm) is incident on two slits 0.100 mm apart. Approximately how far apart (in m) will the bright interference fringes be on the screen 5.00 m from the double slits?
a. 3.47 × 10^?3 b. 3.47 × 10^?2 c. 3.47 × 10^?4 d. 3.47 × 10^?6 e. 3.47 × 10^?5