Information that provides a reliable and valid reflection of the real world is said to be
a. accurate.
b. complete.
c. differentiated.
d. systematic.
e. dependable.
A
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Answer the following statement(s) true (T) or false (F)
1.It is possible to determine the direction of rotation of a motor before power is connected to it. 2.The phase windings of a delta-connected motor must be connected in parallel for use on low voltage. 3.The starting torque of a squirrel-cage motor is high. 4.If it is intended that the motor maintain constant torque for both low and high speeds, the parallel wye connection will provide low speed and the series delta will provide high speed 5.The speed of a wound-rotor motor is uncontrollable.
For two molecule, 1 and 2, we know that ?1 is less than ?2. What can we definitively say?
A. A mole of molecule 1 will display less non-ideal gas behavior than a mole of molecule 2. B. Molecule 1 has higher vapor pressures at all temperatures than molecule 2. C. Molecule 1 is less sphere-shaped than molecule 2. D. The two molecules are different. E. None of these is definitively true, based on just the given information.
If a voltmeter shows a reading of 240 V across the thermal limit to a strip heater on an electric furnace, it indicates:
A) The limit is open, breaking the circuit to the heater. B) The limit is closed, breaking the circuit to the heater. C) The limit is open, completing the circuit to the heater. D) The limit is close, completing the circuit to the heater.
What type of fixed resistor is made from a compound of carbon graphite and resin bonding material?
A. composition carbon B. metal film C. metal glaze D. wire-wound