A point charge creates the electric field shown. At which of the points would the potential energy of a positive test charge have the largest value?
A. A
B. B
C. C
D. D
Answer: D
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Graphical Addition: Refer to the figure, which shows four vectors 
,
, 
, and 
.
(a) Vector 
as
expressed in terms of vectors 
and 
is given byA) 
+ 
.B) 
- 
.C) 
- 
.(b) Vector 
as expressed in terms of vectors 
and 
is given byA) 
+ 
.B) 
- 
.C) 
- 
.
Fill in the blank(s) with the appropriate word(s).
On a cosmic calendar, in which the history of the universe is compressed into 1 year, when did the dinosaurs become extinct?
A) in late December B) in late November C) in late October D) in late September E) in late August
An engineer wants to use a river (minimum temperature of 
to cool his electrical plant which heats water with a boiler operating at 
If he wishes to produce 185 kW of power using this plant, what is the minimum energy he must supply to his boiler if it is maximally efficient?
A. 233 kW B. 187 kW C. 332 kW D. 418 kW
How much heat (in kcal) must be removed to make ice at ?10°C from 2 kg of water at 20°C? (The specific heat of ice is 0.50 cal/g/°C.)
a. 190 b. 200 c. 240 d. 210 e. 50