What is the molecular formula for benzene?
a. C6H6
b. C6H12
c. C6H14
d. C6H8
e. None of these
a
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Which of the following extrasolar planets would be easiest to detect using the Doppler shift method?
A) a massive planet far from its parent star B) a low mass planet far from its parent star C) a low mass planet close to its parent star D) a massive planet close to its parent star
The specific heat of steam is 2,020 J/kg K in the mks system of units. What is the value of the specific heat of steam in cal/gm 
?
A. 1.000 B. 0.8765 C. 0.6812 D. 0.4826 E. 0.2563
When a parachutist jumps from an airplane, he eventually reaches a constant speed, called the terminal velocity. This means that
A) the acceleration is equal to g. B) the force of air resistance is equal to zero. C) the effect of gravity has died down. D) the effect of gravity increases as he becomes closer to the ground. E) the force of air resistance is equal to the weight of the parachutist.
In western movies you often see a person putting his ear against the rails in the train tracks to find out if a train is approaching. Why would this give him advance knowledge of the approach of a train?
What will be an ideal response?