The _______________ is a thin layer of gas from which Earth receives most of the Sun's light
Fill in the blank(s) with correct word
photosphere
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The lensing of a distant quasar is produced by ________ of a foreground galaxy
A) all the normal matter and dark matter B) only the mass of the black hole in the nucleus C) an individual star D) a pulsar's intense magnetic field E) a relativistic jet
A stick is moving along the x-axis at 90%c. A person riding with the stick sees it inclined at 45.° with respect to the x-axis. Observers in the rest frame see the stick making what angle with respect to the x-axis?
A) 79.° B) 66.° C) 53.° D) 45.° E) 88.°
A net force acting on an object will always cause a change in the object's ________
A) speed B) mass C) direction D) momentum
According to Newton's second law, the angular acceleration experienced by an object is directly proportional to:
a. its moment of inertia. b. the net applied torque. c. the object's size. d. choices a and b above which are both valid.