Globular clusters are dominated by bright red supergiants at the top right of the H-R diagram
Indicate whether the statement is true or false
TRUE
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In applications where electrical shocks may be more likely, such as around water in kitchens and bathrooms, special outlets called GFI's are used. What does GFI stand for?
a. get free instantly b. ground-fault interrupter c. give fast interruption d. gravity-free insulator
Barnard's star is 5.9 ly from Earth. Its parallax angle is 0.55". Note 1 pc is 3.26 ly and 1 ly is 63200 AU
a. True b. False Indicate whether the statement is true or false
Current understanding holds that a galaxy's type (spiral, elliptical, or irregular)
A) is always determined by the angular momentum of the protogalactic cloud that formed it. B) may either be the result of conditions in the protogalactic cloud that formed it or the result of later interactions with other galaxies. C) is determined by whether the galaxy is located in a cluster where collisions are likely or outside a cluster where collisions are less likely. D) may either be a result of the mass of the protogalactic cloud that formed it or the result of the heavy element abundance in that cloud.
The diagram below shows the position of a long straight wire perpendicular to the page and a set of directions labeled A through H. When the current in the wire is directed up out of the page, the direction of the magnetic field at point P is
A. E. B. F. C. G. D. H. E. A.