To which portion of the Milky Way are the Magellanic Clouds most similar? Why?
What will be an ideal response?
Like our spiral arms, our two irregular companions are rich in gas, dust, and newly formed stars.
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What is the direction of 
at point P?
A. A B. B C. C D. D E. E F. F T. Zero
A 400-W computer (computer plus monitor) is turned on 8.0 hours per day. If electricity costs 10 cents per kWh, how much does it cost to run the computer annually?
A) $116.80 B) $1168.00 C) $14.60 D) $16.80 E) $146.00
Suppose reaction A involves the making of bonds and 44.5 J of energy, reaction B involves the making of bonds and 17.3 J of energy, and reaction C involves the breaking of bonds and 12.5 J of energy
What is the overall A + B + C reaction energy? Is this an exothermic or an endothermic reaction? Explain.
Lenz's Law: As shown in the figure, a coil of wire is placed in the xy-plane, centered on the z-axis. A solenoid is centered on the z-axis and is carrying a steady dc current. Which one of the following actions will not result induce an emf in the coil?
A. Rotate the coil about the x-axis. B. Rotate the coil about the y-axis. C. Rotate the coil about the z-axis. D. Move the coil toward point P. E. Change the current in the solenoid.