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The following physics responses are provided by a student and, as such, should be considered in that context. While every effort is made for accuracy, absolute correctness cannot be fully guaranteed.
| C | I | Question | Answer |
|---|---|---|---|
| 9 | The condition for onset of turbulent flow is that the Reynolds Number reaches what value? | 3000 | |
| 9 | The flow rate of a liquid through a 2.0-cm-radius pipe is 0.0080 m3/s. The average fluid speed in the pipe is: | 6.4 m/s | |
| 9 | The flow rate of blood through the average human aorta, of radius 1.0 cm, is about 90 cm^3/s. What is the speed of the blood flow through the aorta? | 29cm/s | |
| 9 | The Garfield Thomas water tunnel at Pennsylvania State University has a circular cross-section that constricts from a diameter of 3.6 m to the test section, which is 1.2 m in diameter. If the speed of flow is 3.0 m/s in the large-diameter pipe, determine the speed of flow in the test section. | 27 m/s | |
| 9 | The Greenland ice sheet can be one km thick. Estimate the pressure underneath the ice. (The density of ice is 918 kg/m3.) | 9.0*10^6 Pa (90 atm) | |
| 9 | The pressure inside a commercial airliner is maintained at 1.00 atm (10^5 Pa). What is the net outward force exerted on a 1.0 m * 2.0 m cabin door if the outside pressure is 0.30 atm? | 140000 N | |
| 9 | The quantity "pressure" expressed in terms of the fundamental quantities (mass, length, time) is equivalent to: | ML^-1T^-2 | |
| 9 | The quantity "strain" expressed in terms of the fundamental quantities (mass, length, time) is equivalent to: | a dimensionless quantity. | |
| 9 | The quantity "stress" expressed in terms of the fundamental quantities (mass, length, time) is equivalent to: | ML^-1T^-2 | |
| 9 | The standard kilogram is a platinum-iridium cylinder 39.0 mm in height and 39.0 mm in diameter. What is the density of the material? | 21.5 g/cm^3 | |
| 9 | The water behind Grand Coulee Dam is 1 200 m wide and 150 m deep. Find the hydrostatic force on the back of the dam. (Hint: the total force = average pressure ´ area) | 13.2*10^10 N | |
| 9 | Think of Bernoulli's equation as it pertains to an ideal fluid flowing through a horizontal pipe. Imagine that you take measurements along the pipe in the direction of fluid flow. What happens to the sum of the pressure and energy per unit volume? | It remains constant as the pipe diameter increases. | |
| 9 | Water (density = 1*10^3 kg/m3) flows at 10 m/s through a pipe with radius 0.030 m. The pipe goes up to the second floor of the building, 2.0 m higher, and the pressure remains unchanged. What is the radius of the pipe on the second floor? | 0.034 m | |
| 9 | Water (density = 1*10^3 kg/m3) flows at 15 m/s through a pipe with radius 0.040 m. The pipe goes up to the second floor of the building, 3.0 m higher, and the pressure remains unchanged. What is the speed of the water flow in the pipe on the second floor? | 13m/s | |
| 9 | Water comes down the spillway of a dam from an initial vertical height of 170 m. What is the highest possible speed of the water at the end of the spillway? | 58 m/s |
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