1) What is the volume that an ice cube of mass 25 g takes up if the density of i
ID: 1480062 • Letter: 1
Question
1) What is the volume that an ice cube of mass 25 g takes up if the density of ice is 920 kg/m3?
A.) 0.023 m3
B.) 36,800 m3
C.) 2.72x10-5 m3
D.) 920 m3
2) A block is set on a scale in air and the readout suggests the mass of the block is 3 kg. The same scale is then placed in oil with density of 945 kg/m3 and again the block is placed on the scale. This time the readout on the scale is 2.6 kg. What is the buoyant force on the block?
A.) 29.4 N
B.) 0.4 N
C.) 378 N
D.) 3.92 N
3) A barometer includes an enclosed column of mercury (density 13,600 kg/m3). On a crisp fall evening the height of this column is 735 mm above the surface of the mercury pool beneath it. What is the atmospheric pressure that evening?
A.) 101,325 Pa
B.) 97960.8 Pa
C.) 9996 Pa
D.) 199285,8 Pa
4) A venture meter relies on which two important laws within fluid mechanics?
A.) Pascal’s 1st Law and Pascal’s 2nd Law
B.) Bernoulli’s 2nd Law and Pascale’s 1st Law
C.) Pascal’s 2nd Law and Bernoulli’s Law
D.) Archimedes’ Principle and Pascal’s Law
5) Which of the following is a statement of Archimedes’ Principle?
A.) The buoyant force is the weight of the fluid that is displaced to make room for the object.
B.) The pressure in an enclosed vessel containing an incompressible fluid is transmitted undiminished throughout the fluid.
C.) Pressure decreases when fluids are in motion.
D.) None of the above.
Explanation / Answer
the relation of density and volume is
V = m/ density = 25 g( 1kg/ 1000 g)/ 920 kg/m^3 = 2.72x10^-5m^3
buoyance force
FB = density V g = 945 ( m/desnity) g =945( 3 kg /945) (9.8) = 29.4 N
As per guide lines I did first problem , please post remaining questions in the next time
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