The COBE satellite was designed to image the microwave cosmological background radiation and thus study the earliest stages of the universe
Indicate whether the statement is true or false
TRUE
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Is it possible for an object moving around a circular path to have both centripetal and tangential acceleration?
A) No, because then the path would not be a circle. B) No, an object can only have one or the other at any given time. C) Yes, this is possible if the speed is constant. D) Yes, this is possible if the speed is changing.
Two identical freight cars roll without friction towards each other on a level track. One car rolls at 2 m/s and the other car rolls at 1 m/s. After the cars collide, they couple and roll together with a speed of
A) 0.5 m/s. B) 0.33 m/s. C) 0.67 m/s. D) 1.0 m/s. E) none of the above
According to Shapley, globular clusters were more common toward constellation Aquarius
Indicate whether the statement is true or false
The predominant gas in the atmosphere of Earth is
A) oxygen. B) nitrogen. C) water vapor. D) carbon dioxide. E) methane.