The Porsche Panamera S Hybrid has a top speed of 157 mph.
Answer the following statement true (T) or false (F)
True
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Why is it usually a good idea to create blocks on Layer 0?
What will be an ideal response?
A 3-m-internal-diameter spherical tank made of 1-cm-thick stainless steel is used to store iced water at 0°C. The tank is located outdoors at 25°C. Assuming the entire steel tank to be at 0°C and thus the thermal resistance of the tank to be negligible, determine (a) the rate of heat transfer to the iced water in the tank and (b) the amount of ice at 0°C that melts during a 24-h period. The heat of fusion of water at atmospheric pressure is hif? = 333.7?kJ/kg. The emissivity of the outer surface of the tank is 0.75, and the convection heat transfer coefficient on the outer surface can be taken to be 30?W/m2•K. Assume the average surrounding surface temperature for radiation exchange to be 15°C.
What will be an ideal response?
Ideally, the roof of the house should face __________ so a roof-mounted PV system receives the best exposure.
a. north b. south c. east d. west
A PM DC motor with torque constant kPM is used to power a hydraulic pump; the pump is a positive displacement type and generates a flow proportional to the pump velocity: qp = kp?. The fluid travels through a conduit of negligible resistance; an accumulator is included to smooth out the pulsations of the pump. A hydraulic load (modeled by a fluid resistance R) is connected between the pipe and a reservoir (assumed at zero pressure). Sketch the motor-pump circuit. Derive the dynamic equations for the system, and determine the transfer function between motor voltage and the pressure across the load.
What will be an ideal response?