R-134a and R-12 systems use the same refrigerant oil.
Answer the following statement true (T) or false (F)
False
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Geneticists look for ways to develop high growth-rate animals that result in a quality product that meets consumer standards
Indicate whether the statement is true or false
Capacitor coupling is desirable because
A) bias from one stage can be isolated from the bias circuit of another stage B) it allows the gain of one stage to couple to the next C) capacitors block dc and pass ac D) all of the above
When does boundary lubrication occur?
A. When distances between metal surfaces are wider. B. Only between two dissimilar metal surfaces. C. When distances between metal surfaces are narrow. D. When the primary function of the lubrication is cooling.
If an electric heater requires 23 A at 110 V, determine
a. The power it dissipates as heat or other losses. b. The energy dissipated by the heater in a 24-h period. c. The cost of the energy if the power company charges at the rate 6 cents/kWh. Assumptions: The heater works for 24 hours continuously.