The pressure at a depth of 1.25 m in a tank of liquid is measured to be 125.5 kPa. The tank is open to the outside air - which is at a pressure of 102.0 kPa. What is the density of the fluid?
A. 1920 
B. 10200
C. 18800
D. 2400
A. 1920
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As ice is changed to water, energy is
A) given to the ice. B) taken from the ice. C) neither of these
One type of strain gauge consists of a long thin wire or foil that is folded multiple times, as shown in Figure 6.30. The strain gauge is embedded in an adhesive tape so that the gauge can be attached to a specimen. The wire strains the same amount as the specimen does. Determine the relationship between the change in resistance ?R and the strain (?). Assume that the resistivity (?) of the wire is constant over this strain range and that the material has a Poisson’s ratio of ?. This is a difficult problem.
What will be an ideal response?
A cylinder, semicircular in cross-section, 10.0 m long and 5.00 m in radius, is completely submerged in water. What is the buoyant force on the cylinder?
A) 1.92 × 106 N B) 3.85 × 106 N C) 5.78 × 106 N D) 6.28 × 106 N E) 7.70 × 106 N
Semiconductor elements are "doped" in order to
A. make them less susceptible to temperature changes. B. make them electrically charged. C. eliminate the possibility of incomplete bonds. D. increase their electrical conductivity.