When Cortés arrived in Tenochtitlán, what did he find?
a. a patchwork of huts surrounding a city center
b. mound-like dwellings with no evidence of any centralization
c. a refined city, equal to any in Europe
d. a primitive city, without the refinement known to Europeans
c. a refined city, equal to any in Europe
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The number of cubic feet in one cubic yard of concrete is _____.
a. 3 b. 6 c. 9 d. 27
If a structure has no attic, there should be sufficient insulation in the roof to minimize the heat gain in the occupied space.
Answer the following statement true (T) or false (F)
What is the phase angle corresponding to a phasor represented in rectangular form (1 ? j)?
A. 0 deg B. 135 deg C. 45 deg D. ?45 deg E. ?135 deg
Two loads connected in parallel draw a total of 2.4 kW at 0.8 lagging pf from a 120-V rms, 60-Hz line. One load absorbs 1.5 kW at a 0.707 lagging pf. Determine: (a) the pf of the second load, (b) the parallel element required to correct the pf to 0.9 lagging for the two loads.
What will be an ideal response?