Argon rather than air is the gas used in incandescent bulbs because
A) it produces a pleasing bluish glow.
B) oxygen in air oxidizes the lamp filament.
C) argon is relatively plentiful.
D) none of the above
Answer: B
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Viscosity: Two horizontal pipes have the same diameter, but pipe B is twice as long as pipe A. Water undergoes viscous flow in both pipes, subject to the same pressure difference across the lengths of the pipes. If the flow rate in pipe B is Q = 
what is the flow rate in pipe A?
A. 2Q
B. 4Q
C. 8Q
D. 16Q
E. Q
What is the electric potential at the center of a hollow metal sphere of outside diameter 14. cm which holds a net charge of 3.3 ?C?
What will be an ideal response?
The metric prefix that means one thousand is milli-
Indicate whether the statement is true or false