A utility or building codes may specify that all electric auxiliary heaters used with a heat pump be staged on and off by _____.
a. a setback thermostat
b. outdoor temperature
c. time of day
d. indoor temperature
b. outdoor temperature
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A piston-cylinder device is filled with 5 kg of liquid water at 150°C. The specific volume of the liquid water is 0.0010905 m3/kg. Heat is added to the water until some of the water boils, giving a liquid-vapor mixture with a specific volume of 0.120 m3/kg . The pressure of the water is 475.8 kPa. How much work was done by the expanding water vapor?
Given: m = 5 kg; v1 = 0.0010905 m3/kg; v2 = 0.120 m3/kg; P = 475.8 kPa What will be an ideal response?
Assume that a retailer sells 800 six packs of Dr. Pepper per day at a price of $3.00/six-pack. You, as an economic analyst, estimate that the cross-price elasticity between Dr. Pepper and Coca-Cola is 0.6. If the retailer raises the price of Coca-Cola by 10%, how would the sales of Dr. Pepper be affected, ceteris paribus ?
A) Sales of Dr. Pepper would rise by 10% B) Sales of Dr. Pepper would rise by 48 six-packs C) Sales of Dr. Pepper would fall by 48 six-packs D) None of the above
An E-MOSFET has an ID(on) of 12 mA at a VGS of 9 V and a VGS(TH) of 1.6 V. The value of k is
A) 4.68 × 10-3 mA/V2 B) 1.62 × 10-3 mA/V2 C) 2.19 × 10-4 mA/V2 D) 1.33 × 10-3 mA/V2
A dimm ________
A) has contact pins on both sides of the module for larger data paths B) has less memory than the newer SIMM modules C) is available in 30-pin or 72-pin packages D) has contact pins on only one side of the module