We are located at the
A) edge of our entire universe
B) center of our observable universe
C) edge of our observable universe
D) center of our entire universe
B
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Where on the celestial sphere would you look for the planets?
A. in the zodiac (near the ecliptic) B. on the galactic equator C. at the north celestial pole D. on the celestial equator
Which of the following procedures would not be expected to increase the yield strength of LDPE?
(a) Quenching the LDPE to room temperature from the liquid state (b) Increasing the crystallinity (c) Increasing the molecular mass (d) Decreasing the side branching
Work: A person carries a 2.00-N pebble through the path shown in the figure, starting at point A and ending at point B. The total time from A to B is 6.75 min. How much work did gravity do on the rock between A and B?
A. 30.0 J B. -30.0 J C. -56.0 J D. 56.0 J E. -36.0 J
Suppose the Hubble constant turned out to be 130 km/sec/Mpc and not 65 km/sec/Mpc. How would that affect our estimate of the age of the Universe?
A. The Universe would be about 7 billion yrs old. B. The Universe would be about 30 billion yrs old. C. It would have no effect on our estimates of the Universe's age. D. The Universe would be about 130 billion yrs old. E. None of these choices is correct.