What are the Magellanic Clouds?
A) two small galaxies that orbit the Milky Way Galaxy
B) two nebulae located in the disk of the Milky Way galaxy and visible only from the Southern Hemisphere
C) star-forming clouds found in the constellation Orion
D) the clouds of dust and gas found interspersed in many places throughout the Milky Way Galaxy
A) two small galaxies that orbit the Milky Way Galaxy
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A CD with a diameter of 12.0 cm starts from rest and with a constant angular acceleration of 1.00 
acquires an angular velocity of 5.00 rad/sec. The CD continues rotating at 5.00 rad/sec for 15.0 seconds and then slows to a stop in 12.0 second with a constant angular deceleration. What is the total acceleration of a point 4.00 cm from the center at the time 30.0 seconds from the start?
A. 0.0650 
B. 0.0522
C. 0.0444
D. 0.0324
E. 0.0243
When a particular capacitor is connected to a source of sinusoidally varying emf with constant amplitude and a frequency of 60.0 Hz, the rms current is 3.00 A. What is the rms current if the source frequency is doubled?
1.12.0 A 2.6.00 A 3.4.24 A 4.3.00 A 5.1.50 A
Except for 1H and 3He, all nuclei having fewer ______________ than ______________ are radioactive
Fill in the blank(s) with correct word
A design requires a material that must have a high melting temperature, high stiffness, high compressive strength, low density, and low cost. Which of the following materials is most likely to best satisfy the design requirements?
(a) Alumina ceramic (b) Carbon steel (c) Polyethylene (d) Graphite-reinforced-epoxy composite