Determine the wetted perimeter and the hydraulic diameter DH, for a circular tube filled with R-134a liquid as shown in the sketch.
What will be an ideal response?
The wetted perimeter is indicated in the sketch. It is the wetted portion of the circumference.
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The hydroxide ion has a charge of
a. 1–. b. zero. c. 1+. d. 2+.
The largest volcanic structures on Venus are called:
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Two point charges of magnitude 4.0 ?C and -4.0 ?C are situated along the x-axis at x1 = 2.0 m and x2 = -2.0 m, respectively. What is the electric potential at the origin of the xy-coordinate system?
A) -36 × 103 V B) 0 V C) 36 × 103 V D) -48 × 103 V E) 48 × 103 V
Only two forces act on a 3.0-kg mass. One of the forces is 9.0 N east, and the other is 8.0 N in the direction of 62° north of west. What is the magnitude of the acceleration of the mass?
A. 2.0 m/s2 B. 2.4 m/s2 C. 3.3 m/s2 D. 2.9 m/s2 E. 5.7 m/s2