A fountain sends water to a height of 100 meters. What must be the pressurization (above atmospheric) of the water system? 1 atm= 1.01 × 10^5 N/m2
a. 1.0 atm
b. 4.2 atm
c. 7.2 atm
d. 9.7 atm
e. 8.2 atm
d
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Areas near a cold ocean or other cold body of water often experience a 'sea breeze' during the late morning, particularly on warm, sunny days. The process of energy transfer most directly associated with the development of the sea breeze is
1.conduction. 2.convection. 3.radiation. 4.none of these.
On a Hertzsprung-Russell diagram, where would you find stars that are cool and dim?
A) upper right B) lower right C) upper left D) lower left
Three identical 6.0-kg cubes are placed on a horizontal frictionless surface in contact with one another. The cubes are lined up from left to right and a force is applied to the left side of the left cube causing all three cubes to accelerate to the right at 3.0 m/s2 . What is the magnitude of the force exerted on the middle cube by the left cube in this case?
a. 18 N b. 36 N c. 27 N d. 21 N e. none of the above
When the equation Al + O2? Al2O3 is balanced, the coefficient of Al2O3 is
a. 1 b. 2 c. 3 d. 4