How would our view of our galaxy be different if we were located in the central bulge? What about if we were located in a halo globular cluster?
What will be an ideal response?
From within the central bulge of the galaxy, we would have difficulty observing the galactic disk— the night sky would be bright in all directions thanks to the more crowded region, and to the roughly spherical distribution of stars. From the galactic halo, we would be able to directly view much of the galaxy and simultaneously see the disk and the bulge from the outside.
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What resolving power is needed to resolve spectral lines at 651.22 nm and 651.81 nm?
A) 1100 B) 1000 C) 1200 D) 1400 E) 1300
Earth's radius at the equator is larger than that at the poles. Where is Earth's surface gravity more?
A. at the equator B. at the top of Mount Everest C. at the North and South Poles D. It is the same everywhere.
A step-up transformer steps up voltage by ten times. If voltage input is 120 volts, voltage output is
A) 60 V. B) 120 V. C) 1200 V. D) 12000 V. E) none of the above
If an electric field of magnitude 25 V/m makes an angle of 30° with a path of length 10 m, then the integral of E?dl over this path has a value of
A) 30 V. B) 250 V. C) 125 V. D) 217 V. E) -250 V.