In a(n) ______ live chat, visitors initiate the chat.

A. proactive
B. agent
C. sidebar
D. broadcast


Answer: D

Physics & Space Science

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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.

Physics & Space Science

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

Physics & Space Science

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.
.

Physics & Space Science

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

Physics & Space Science