An example of a heat engine is
A) an aircraft turbine.
B) an automobile internal combustion motor.
C) the steam engine of a railroad train.
D) the gasoline motor of a leaf blower.
E) all of the above
Answer: E
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What area plates would a parallel plate 1.0 F capacitor have with a plate separation of 0.10 mm and a dielectric of constant 10?
A. 1000
B. 5500
C. 130 
D. 
E. 
A 4.0 ?F capacitor is charged to 6.0 V. It is then connected in series with a 3.0 M? resistor and connected to a 12. V battery. How long after being connected to the battery will the voltage across the capacitor be 9.0 V?
A) 5.5 s B) 8.3 s C) 11. s D) 12. s E) 17. s
Why is the southern hemisphere of Mars believed to be older than the northern?
A) The southern hemisphere is darker much like the lunar mare. B) The southern hemisphere is more heavily cratered. C) The northern hemisphere is higher, due to the Tharsis Bulge. D) The northern hemisphere leans more away from the Sun in winter. E) The south polar cap is much thicker than the north one.
You walk 33m to the north, then turn 60° to your right and walk another 45m How far are you from where you originally started?
A) 35 m B) 75 m C) 39 m D) 68 m