In order to calculate the size and luminosity of a galaxy, you must first determine its ____
a. age
b. mass
c. shape
d. metallicity
e. distance
e
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Mineralogical analysis of a rock can tell us
A) the detailed geological history of the rock B) what the rock is made of C) when the rock formed D) the temperature and pressure conditions under which it formed
A spaceship, traveling at 0.100c away from a stationary space platform, launches a secondary rocket towards the station, with a speed of 0.560c relative to the spaceship
What is the speed of the secondary rocket relative to the space platform? A) 0.460c B) 0.487c C) 0.492c D) 0.550c E) 0.660c
A magnifying glass produces a virtual image
Indicate whether the statement is true or false
An originally neutral electroscope is briefly touched with a positively charged glass rod. The electroscope
A) remains neutral. B) becomes negatively charged. C) becomes positively charged. D) could become either positively or negatively charged, depending on the time of contact.