Double-lobed radio galaxies appear to be emitting jets of gas and radiation
a. True
b. False
Indicate whether the statement is true or false
True
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Two identical objects in outer space, one moving at 2 m/s, the other at 1 m/s, have a head-on collision and stick together. Their combined speed after the collision is
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
Instructions: On occasion, the notation 
will be a shorthand notation for 
.
If 
= [10 m, 30°] and 
= [25 m, 130°], what is the magnitude of the sum of these two vectors?
A. 20 m
B. 35 m
C. 15 m
D. 25 m
E. 50 m
A 1321-kg car climbs a 5.0° slope at a constant speed of 80km/s Assuming that air resistance may be neglected, at what rate (in kW) must the engine deliver energy to the drive wheels of the car?
A) 25 kW B) 48 kW C) 287 kW D) 38 kW
Water able to be contained in the subsurface depends on
A) permeability. B) porosity. C) chemical composition. D) none of these