This Hubble Space Telescope photo shows the bright active galactic nucleus in the center of galaxy M87. What is the long bluish streak coming out of it?
A) a "jet" of material being shot out at high speed
B) the blueshifted light of gas that is moving toward us
C) a stream of material that is falling in toward an accretion disk
D) a spiral arm filled with regions of active star formation
A) a "jet" of material being shot out at high speed
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As you move farther away from a source emitting a pure tone, the ___________ of the sound you hear decreases
a. frequency b. period c. wavelength d. amplitude e. none of the above
A simple beam AB with an overhang BC is loaded as shown in the figure. The bending moment at the midspan of AB is approximately:
(A) 8 kN?m
(B) 12 kN?m
(C) 17 kN?m
(D) 21 kN?m
An indication of an object's inertia is given by its ______________
Fill in the blank(s) with correct word
Who discovered the electron in 1897?
a. Ernest Rutherford b. James Chadwick c. J. J. Thomson d. Niels Bohr