Practice Problem for Quiz 2
1. Number the following acids in decreasing order of acidity (1 for the strongest acid).
CH3CO2H
H 2O
HF
HBr
2. Number the following in order of increasing basicity (a, b) and increasing acidity (c, d).
_
+
(a) CH3NH2, CH3NH3 ,
0.1 4 The expression for the current in the 2-9 resistor in Figure C? for time greater than
umh
a. 3e'°" + 3A b. 36°! + 3 A c. 3e°"' + 3 A
d. Ge°'5 + 6A e. 6e'0'5' + 6 A
(:0 4
12V 20
Figure 0.7
(3.1 5 A three-phase circuit is shown in Figure C.8. Load res
0.1 7 The phase current is most nearly
a. 4.4é53.l3° A b. 2.4453.13° A c. 4.4£0° A
d. 4.4l 53.l3° A e. 2.44 53.l3° A
0.1 8 The line current I (in amperes) is most nearly
a. 4.44 l86.87° b. 4.4l23 c. 7 d. 7.6423 e. 74 186.87°
C. 1 9 The power factor is mos