In a(n) ______ live chat, visitors initiate the chat.
A. proactive
B. agent
C. sidebar
D. broadcast
Answer: D
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Suppose that we connect two identical realistic batteries in parallel. The internal resistance of the combined set of batteries (considered as a unit) is
A. twice that of each individual battery. B. half that of each individual battery. C. the same as that of each individual battery.
Suppose the gravitational force of the Earth on a body was 
. What escape velocity ve would a body need to escape the gravitational field of the Earth?
A.
.B.
.C.
.D.
.E.
.A 30-?F capacitor is charged to 80 V and then connected across an initially uncharged capacitor of unknown capacitance C. If the final potential difference across the 30-?F capacitor is 20 V, determine C.
A. 60 ?F B. 75 ?F C. 45 ?F D. 90 ?F E. 24 ?F
What is the formula mass of ammonium phosphide, (NH4)3P?
a. 85.0 u b. 49.0 u c. 48.0 u d. 57.0 u