An astronomer named _______________ used globular clusters to locate the center of the galaxy. (enter last name only)
Fill in the blank(s) with correct word
Shapley
Physics & Space Science
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The angular size of the Sun as observed from Earth is about 0.5 degree.
Answer the following statement true (T) or false (F)
Physics & Space Science
The ideal efficiency for a heat engine operating between the temperatures of 227°C and 27°C is
A) 20%. B) 25%. C) 40%. D) 88%. E) none of the above
Physics & Space Science
Refraction occurs when light passing from one medium to another
A) changes frequency. B) changes speed. C) loses energy. D) reflects inward.
Physics & Space Science
The captain orders his starship to accelerate from rest at a rate of "1 g" (1 g = 9.8 m/s2). How many days does it take the starship to reach 10% the speed of light? (Light travels at 3.0 × 108 m/s.)
a. 5 days b. 11 days c. 14 days d. 28 days e. 35 days
Physics & Space Science