Suppose that the three fundamental standards of the metric system were length, density, and time rather than length, mass, and time. The standard of density in this system is to be defined as that of water. Which of the following are among the considerations about water that you would need to address to make sure that the standard of density is as accurate as possible?
(i) That the amount of water is at some defined value.
(ii) That the pressure of the water is at some defined value.
(iii) That the temperature of the water is at some defined value.
(iv) That the water is pure.
1.(ii), (iii) and (iv)
2.(i) only
3.all four
4.(i), (ii), and (iii)
1
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The bathyscaphe Trieste consists of a thin-walled but very strong cylindrical hull, 15.2 m long and 3.66 m in diameter,
filled with gasoline with a density of 880 kg/m3 to make it buoyant. If it is totally submerged in seawater with a density of 1025 kg/m3 and neither rising nor sinking, what is the weight of the Trieste craft? A) 127 kN B) 227 kN C) 327 kN D) 427 kN E) 527 kN
The diagram below shows a cross section of the interior of Uranus. Which of the regions do current computer models suggest is composed primarily of liquid water? The lowest pressure regions will be gaseous
a.
region 1
b.
region 2
c.
region 3
d.
all of the regions
e.
none of the regions
The thermal expansion of a solid is caused by
a. the breaking of bonds between atoms. b. increasing the amplitude of the atoms vibration. c. increasing the distance between equilibrium positions for the vibrating atoms. d. all of the above.
Galileo used a telescope to observe the phases of the Sun
a. True b. False Indicate whether the statement is true or false