An ideal fluid, of density 0.90 × 10^3 kg/m3, flows at 12 m/s through a level pipe with radius of 0.50 cm. The pressure in the fluid is 1.3 × 10^5 N/m2 . This pipe connects to a second level pipe with a radius of 1.5 cm. Find the speed of flow in the second pipe
a. 54 m/s
c. 0.67 m/s
b. 1.3 m/s
d. 0.33 m/s
B
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In an isochoric process, the internal energy of a system decreases by 50J. What is the work done?
A. zero B. +50 J C. -50 J D. none of the above
If the velocity versus time graph of an object is a straight line making an angle of +30° (counter clockwise) with the time axis, the object is
A) moving with constant non-zero speed. B) moving with constant non-zero acceleration. C) at rest. D) moving with increasing acceleration.
Four equal resistors connected across a DC voltage source in either series or parallel will have equal voltage drops across each resistor
Indicate whether the statement is true or false
In a severe drought, groundwater does not get recharged. To get to the groundwater
A) deeper wells must be dug. B) more water wells are needed. C) water wells need to be located next to streams. D) water wells need to be dug at higher elevation.