El peso por volumen de un material se conoce como _____.
a. densidad
b. elevación
c. masa
d. gravedad específica
Answer: A
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The supercharger is driven by:
A. Exhaust gas flowing over the compressor wheel B. The crankshaft C. An electric motor D. The camshaft
Which of the following statements is correct in regard to poured-in-place concrete?
A. Poured-in-place concrete is essentially the same as tension concrete. B. Poured-in-place concrete is poured at a plant or shop and shipped to the jobsite for erection C. Poured-in-place concrete is significantly stronger than precast reinforced concrete. D. Poured-in-place concrete is usually poured in wooden forms as a part of the structure.
____ requires large amounts of energy to produce, so green builders may wish to lower the embodied energy in a structure by reducing the amount of concrete in a foundation as well as the amount of cement in the concrete mix.
A. Limestone B. Silica C. Slag D. Portland cement
In the circuit shown in Figure P2.27, determine the terminal voltage vT of the source, the power absorbed by Ro, and the efficiency of the circuit. Efficiency is defined as the ratio of load power to source power.
Find:
The terminal voltage of the source; the power supplied to the circuit, the efficiency of the circuit.
Assumptions:
Assume that the only loss is due to the internal resistance of the source.