Hubble reveals the most distant (first) galaxies were bluer than those of today
Indicate whether the statement is true or false
TRUE
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A general condition that two waves undergo constructive interference is that
A. their phase difference is zero.
B. their phase difference is
C. their phase difference is
D. their phase difference is an even integral multiple of
E. their phase difference is an odd integral multiple of
How does an antiquark differ from a quark?
A) It has a different flavor. B) It has opposite mass. C) It has a much greater mass. D) It has opposite charge. E) It is much more common in nature.
Do all galaxies out beyond the Milky Way rise in the east and set in the west (if they aren't circumpolar)?
A) Impossible to say for sure, since we haven't yet seen all of the galaxies in the universe. B) no C) yes
A wheel rotates about a fixed axis with an initial angular velocity of 20 rad/s. During a 5.0-s interval the angular velocity increases to 40 rad/s. Assume that the angular acceleration was constant during the 5.0-s interval. How many revolutions does the wheel turn through during the 5.0-s interval?
a. 20 rev b. 24 rev c. 32 rev d. 28 rev e. 39 rev