Observing our galaxy at radio wavelengths allows us to see through the dust in the disk that obscures our view
Indicate whether the statement is true or false
TRUE
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If you find yourself in a locality where the magnetic declination is "15.° East," in which direction is true North in relation to a compass needle?
What will be an ideal response?
Photons are
A. negatively charged B. uncharged, particle-like bundles of energy C. positively charged
At t = 0 the switch S is closed with the capacitor uncharged. If C = 50 ?F, ? = 20 V, and R = 4.0 k?, what is the charge on the capacitor when I = 2.0 mA?
a.
360 ?C
b.
480 ?C
c.
240 ?C
d.
600 ?C
e.
400 ?C
In order to predict whether a star will eventually fuse oxygen into a heavier element, what do you need to know about the star?
A) its luminosity B) its overall abundance of elements heavier than helium C) how much oxygen it now has in its core D) its mass