Which type of binary can have their sizes measured directly by photometry?
A) virtual
B) visual
C) eclipsing
D) spectroscopic
E) astrometric
C
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Center of Mass: Three balls are moving along a straight line having the instantaneous positions shown in the figure. At that instant, find the location and velocity of the center of mass (or center of gravity) of this system.
What will be an ideal response?
The method of standard candles can be used to measure a star's ________.
A. luminosity B. brightness C. mass D. distance E. absolute magnitude
In many cartoon shows, a character runs of a cliff, realizes his predicament and lets out a scream. He continues to scream as he falls
If the physical situation is portrayed correctly, from the vantage point of an observer at the top of the cliff leaning over the edge, the pitch of the scream should be A) higher than the original pitch and constant. B) higher than the original pitch and increasing as he falls. C) lower than the original pitch and constant. D) lower than the original pitch and decreasing as he falls. E) It is impossible to predict.
Most of the Rocky Mountains, in the western United States, lie in the ______________ Standard Time zone
a. Mountain b. Eastern c. Central d. Pacific