The human ear is most sensitive to sounds at which of the following frequencies?
A) 63 Hz.
B) 1000 Hz.
C) 500 Hz.
D) 250 Hz.
B) 1000 Hz.
You might also like to view...
What is the best way to warm a refrigerant cylinder?
A) Over a hot flame B) With a torch C) By pouring boiling water over the cylinder D) In a bucket of warm water
This question is based on the following five alternatives that are evaluated by the rate of return method.
 FIGURE 1.png)
Jewel-Osco evaluated three different pay-by-touch systems that identify a customer by a finger scan and automatically deduct the amount of the bill directly from their checking account. The revenue alternatives were ranked according to increasing initial investment and identified as alternatives A, B, and C.
 figure 2.png)
In the Battle of Carthage in 255 BCE, what wreaked havoc with Rome’s legions of disciplined soldiers?
a. the corvus b. Carthaginian quinqueremes c. mercenaries from Numidia d. elephants
Confederate commerce-raiders such as the Alabama
A. were of little value. B. proved effective against Union shipping. C. were supplied by the French. D. lasted less than a year. E. operated mostly off the Atlantic coast.