A(n) ____ is 1/60th of a minute of arc
a. precession
b. second of arc
c. degree
d. nadir
e. angular diameter
b
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A glass thermometer using a thin column of ethyl alcohol at room temperature (293.0 K) is cooled. When the temperature reaches 273.0 K the column of alcohol is 15.50 cm high. How tall was it when the temperature was 293.0 K? The coefficient of volume expansion of mercury is 
A. 15.85 cm B. 15.86 cm C. Cannot answer without knowing the diameter of the column D. 15.62 cm
In an ac circuit, if the peak value of the voltage is 100 V, what is the rms value?
A) 141 V B) 100 V C) 210 V D) 71 V E) 120 V
The oldest intact rocks found on Earth date back to approximately
A) 4.57 billion years ago B) 3.85 billion years ago C) 4.38 billion years ago D) 4.02 billion years ago
If 
what is the power supplied to the circuit by 
?
A. 4.0 W
B. 8.0 W
C. 12 W
D. 16 W
E. 20 W