A fountain sends water to a height of 113 m. What must be the pressurization (above atmospheric) of the underground water system? (1 atm = 105 N/m2)
a. 1.0 atm
b. 47.1 atm
c. 12.1 atm
d. 11.1 atm
e. 0.115 atm
d
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The torque due to the frictional resistance of the oil film between a rotating shaft and its bearing is found to be dependent on the force F normal to the shaft, the speed of rotation N of the shaft, the dynamic viscosity ? of the oil, and the shaft diameter D. Establish a correlation among the variables by using dimensional analysis.
GIVEN The oil film between a rotating shaft and its bearing The torque (T) due to frictional resistance is a function of normal force (F), speed of rotation (N), dynamic viscosity (?), and shaft diameter (D) FIND A correlation among the variables ASSUMPTIONS Steady state
Two bulbs are shown in a circuit that surrounds a region of increasing magnetic field directed out of the page. When the switch is closed,
A. bulb 1 glows more brightly. B. bulb 2 glows more brightly. C. both bulbs continue to glow with the same brightness. D. bulb 1 goes out. E. bulb 2 goes out.
According to our theory of solar system formation, what three major changes occurred in the solar nebula as it shrank in size?
A) Its gas clumped up to form the terrestrial planets, nuclear fusion produced heavy elements to make the jovian planets, and central temperatures rose to more than a trillion Kelvin. B) It gained energy, it gained angular momentum, and it flattened into a disk. C) It got hotter, its rate of rotation increased, and it flattened into a disk. D) Its mass, temperature, and density all increased.
What are redshift surveys designed to show?
What will be an ideal response?