How does a communicating thermostat know what type of equipment is connected to it?
What will be an ideal response?
When the system is powered on for the first time, the controller
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?During normal power steering pump operation:
A. ?The fluid pressure from the outlet fitting venturi moves the flow control valve toward the open position. B. ?Pump flow increases as the engine speed increases. C. ?The pressure relief valve opens when the engine speed is increased with the front wheels straight ahead. D. ?The flow control valve spring moves this valve toward the open position.
To reduce fire risk, use a 2-wire NMB cable to supply two circuits for a room. One circuit is used for lighting and one for ____.
a. heat b. receptacles c. air conditioner d. floor
Answer the following statement(s) true (T) or false (F)
1. Thermopile is the name given to devices that produce a small emf when the junction of two dissimilar metals is being heated. 2. Some materials develop opposite electrical charges on opposite sides when they are compressed (or twisted, bent, or stretched). 3. Electrolysis uses an electrical current to produce desirable chemical changes or variations in the properties of certain substances. 4. Magnetic crystals are used in small earphones, where the crystal magnetizes a diaphragm, causing audible sound waves. 5. Electricity and magnetism are two distinctly different and unrelated phenomena.
On a freeway entrance ramp, a car accelerates from 15.0 MPH to 60.0 MPH in a time of 10.0 seconds. What is the average acceleration during this time, in units of ft/ s^2?
What will be an ideal response?