A 2.0-kg particle has an initial velocity of 
m/s. Some time later, its velocity is
m/s. How much work was done by the resultant force during this time interval, assuming no energy is lost in the process?
A. 17 J
B. 49 J
C. 19 J
D. 53 J
E. 27 J
Answer: A
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The frequency of a periodic wave is 325 Hz. If the wavelength is 50.0 cm, then what is the velocity of the wave?
A. 163 m/s B. 203 m/s C. 237 m/s D. 285 m/s E. 316 m/s
Radiometric dating assumes that, once a mineral has crystallized, any daughter product results only from the decay of the original unstable parent. Some complications are
A) variations in temperature. B) failure to take samples too close together. C) "time clock resetting" due to metamorphism, and product leakage that yields false age estimation. D) a poorly maintained teleometer.
The exhaust product from a hydrogen fuel cell is
A) carbon dioxide. B) methane. C) pure water. D) nitric acid.
Which variable is increasing the fastest on the graph prepared in Procedure 2?