Fluid Flow: An ideal incompressible fluid flows at 0.252 m/s through a 44-mm diameter cylindrical pipe. The pipe widens to a square cross sectional area that is 5.5 cm on a side. Assume steady flow throughout the system.(a) What is the speed of the fluid through the square section of pipe?(b) What is the flow rate in liters per minute?
What will be an ideal response?
(a) 0.13 m/s (b) 23 L/min
Physics & Space Science
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Power: A certain battery charger uses 12 W of power. At 6.0 cents per kilowatt-hour, how much does it cost to charge batteries for a full day?
A. 28¢ B. 1.4¢ C. 75¢ D. 1.7¢ E. 2.3¢
Physics & Space Science
If the radius of the earth is 6400.0 km and the atmosphere is 10.0 km high, then the volume of air around the earth is
A. 
B. 
C. 
D. 
Physics & Space Science
The unit of electric current, the ampere, is equivalent to which of the following?
a. V?? b. V/? c. ??m d. V/s
Physics & Space Science
The number of overtones, and their relative intensities, is associated with what property of the tone generated by a musical instrument?
a. quality b. interference pattern c. range d. attack pattern
Physics & Space Science