A spherical galaxy, like M87, which looks like a monster globular cluster, is type:
A) S0.
B) ES.
C) E0.
D) ES1.
E) 0V.
C
Physics & Space Science
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Star A has a radius of 200 000 km and a surface temperature of 6 000 K. Star B has a radius of 400 000 km and a surface temperature of 3 000 K. The emissivity of both stars is the same. What is the ratio of the rate of energy radiated by Star A to that of Star B?
Physics & Space Science
______________ is the study of planet Earth
Fill in the blank(s) with correct word
Physics & Space Science
The chemical formula that represents the burning of wood or paper is
A) CO2 ? C+O2. B) C + O2 ? CO2. C) C + O ? CO. D) H2 + O ? H2O. E) C + H2O ? CH2O.
Physics & Space Science