The Andromeda Galaxy has a look-back time of:
A) 4 years.
B) 2000 years.
C) 2 million years.
D) 2 billion years.
C
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An object moving at a constant speed requires 6.0 s to go once around a circle with a diameter of 4.0 m. What is the magnitude of the instantaneous acceleration of the particle during this time?
A. 2.2 m/s2 B. 2.7 m/s2 C. 3.3 m/s2 D. 3.8 m/s2 E. 4.4 m/s2
In nickel-silver copper alloys, the major alloy elements are nickel and _________.
Fill in the blank(s) with the appropriate word(s).
An object moves with speed vx = +0.9 in the Home Frame. In an Other Frame moving at ? = 0.60 relative to the Home Frame, the object’s x-velocity v?x is
A. v?x = 1.5 B. 1 < v?x < 1.5 C. 0.9 < v?x < 1 D. 0.3 < v?x < 0.9 E. v?x < 0.3 F. v?x < 0
Which moon has a thick atmosphere made mostly of nitrogen?
A) Europa B) Titan C) Triton D) Ganymede