Fluid Flow: A pump uses a piston of 15 cm diameter that moves at 2.0 cm/s as it pushes a fluid through a pipe. What is the speed of the fluid when it enters a portion of the pipe that is 3.0 mm in diameter? Treat the fluid as ideal and incompressible.

A. 50 m/s
B. 50 cm/s
C. 6.0 cm/s
D. 22 cm/s


Answer: A

Physics & Space Science

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The gravitational field at a satellite that is orbiting about the earth at an altitude of 5,000 km is (G =the mass of the earth is

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A 2.0-g string that is 0.67 m long is under tension. The string vibrates at 700 Hz tone in its third harmonic, and this vibration causes a sound wave. What is the wavelength of the sound? The speed of sound in air is 344 m/s

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Two blocks are arranged as shown and kept at rest by holding the 1 kg block in place

The tension in the string is closest to:

1.9 N 2.10 N 3.11 N 4.12 N 5.13 N 6.10 N at the left end; 12 N at the right 7.10 N in the left segment; 11 N in the middle segment; 12 N in the right segment 8.Smoothly varying from 10 N by the left block to 12 N by the right block 9.None of the above 10.Impossible to determine

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The region from the origin to the elastic limit on an applied force versus elongation graph for a typical metal under tension is referred to as the

A) elastic region. B) proportional region. C) plastic region. D) ultimate strength region. E) breaking region.

Physics & Space Science