Most states set the height limit of commercial vehicles between _____.
a. 121
?2' to 13' (3.81 to 3.96 meters)
b. 13' to 131?2' feet (3.96 to 4.11 meters)
c. 131
?2' to 14' (4.11 to 4.27 meters)
d. 14' to 141
?2' (4.27 to 4.42 meters)
c. 131
?2' to 14' (4.11 to 4.27 meters)
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Bottom heat can be manipulated in two phases with ________ temperature for root initiation and a ________ temperature for root development.
Fill in the blank(s) with the appropriate word(s).
A piston compresses two kilograms of air in an insulated cylinder such that the pressure changes from 100 kPa to 1000 kPa. If the initial temperature is 25ºC, the entropy change of the air is nearest:
A) 3.6 kJ/K B) 2.2 kJ/K C) 1.7 kJ/K D) 0.008 kJ/K
A penny and a nickel are tossed. Both are fair coins. Let X = 1 if the penny comes up heads, and let X = 0 otherwise. Let Y = 1 if the nickel comes up heads, and let Y = 0 otherwise. Let Z = 1 if both the penny and nickel come up heads, and let Z = 0 otherwise.
a. Let 
denote the success probability for X. Find .
b. Let 
denote the success probability for Y. Find .
c. Let 
denote the success probability for Z. Find .
d. Are X and Y independent?
e. Does 
f. Does Z = XY? Explain.
Calculate the following:
A 500 hp, three-phase, 2200 V, 60 Hz, 12-pole, Y-connected wound-rotor
induction motor has the following parameters:
a. Slip at maximum torque
b. Input current and power factor at maximum torque
c. Maximum torque
d. Resistance that must be added to the rotor windings (per phase) to achieve
maximum torque at starting