Suppose you measure the parallax angle for a particular star to be 0.1 arcseconds. What is the distance to this star?
A) 10 light-years
B) 10 parsecs, which is about 32.6 light-years
C) 0.1 light-year
D) 0.1 parsec, which is about 0.326 light-year
E) impossible to determine
B) 10 parsecs, which is about 32.6 light-years
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How much power does a sphere with a radius of 10 cm radiate into empty space if is has an emissivity of 1.0 and is kept at a temperature of 400 K? (? = 5.67 × 10-8 W/m2 ? K4 )
A) 60 W B) 70 W C) 180 W D) 210 W E) 360 W
How many elements have been identified?
a. 92 b. 104 c. 114 d. over 200 e. none of the above
Including relativistic effects, doubling the speed of a object:
a. has no effect on its momentum. c. less than doubles its momentum. b. more than doubles its momentum. d. doubles its momentum.
Sequence the events in the origination of different types of meteorites
What will be an ideal response?