For a comparison of in-line to staggered tube banks for a heat exchanger, determine a relationship when a staggered tube arrangement will have a maximum Reynold’s number between adjacent staggered columns as compared to between two tubes in line.
What will be an ideal response?
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According to the authors of the text, which of the following best describes how our common sense relates to the theory of relativity?
A) Relativity does not violate our common sense because we do not have common sense about motion near the speed of light. B) Relativity violates common sense because it contradicts logic. C) Relativity violates common sense because it is counterintuitive. D) Relativity violates common sense because the theory contradicts itself in many cases. E) Relativity violates common sense because it is full of paradoxes.
A series ac circuit has a resonance frequency of 9.0 kHz. If the inductor in the circuit has a value of 2.0 H, and the resistance is 75 ?, what is the capacitance of the circuit?
A) 0.16 pF B) 156 pF C) 6.2 pF D) 17.7 pF
When sodium and chlorine react to form sodium chloride, an ionic compound,
a. each sodium atom loses two electrons. b. each sodium atom loses one electron. c. each chlorine atom loses one electron. d. each chlorine atom loses two electrons.
A 2.0-kg block slides down a plane (inclined at 40° with the horizontal) at a constant speed of 5.0 m/s. At what rate is the gravitational force on the block doing work?
a. +98 W b. +63 W c. zero d. +75 W e. -75 W