A star with a parallax angle of 1/20 arcsecond is ________
A) 20 parsecs away B) 20 light-years away
C) 10 parsecs away D) 1/20 parsec away
A
You might also like to view...
One member of a pair of parallel conducting plates has potential 17 V. An electron is ejected from that plate at potential and travels the other plate, attaining a velocity of 
when it arrives. What is the potential of the second plate? The mass of the electron is 
kg.
A. 157 V B. 89 V C. 72 V D. -54 V E. 142 V
Only Jupiter and Saturn have rings
a. True b. False Indicate whether the statement is true or false
Process of Science: Most galaxies do not obey Hubble's Law perfectly. Why do we not take this as evidence that Hubble's law (and the theory of the expanding universe) is incorrect?
What will be an ideal response?
A gasoline engine absorbs 2500 J of heat and performs 1000 J of mechanical work in each cycle. The amount of heat expelled in each cycle is
A. 1000 J B. 1500 J C. 2000 J D. 500 J E. 3000 J