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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 | A fluid is drawn up through a tube as shown below. The atmospheric pressure is the same at both ends. Use Bernoulli's equation to determine the speed of fluid flow out of the tank. If the height difference from the top of the tank to the bottom of the siphon is 1.0 m, then the speed of outflow is: | 4.4m/s | |
| 9 | A fountain sends water to a height of 100 m. What must be the pressurization (above atmospheric) of the underground water system? (1 atm = 105 N/m2) | 9.8 atm | |
| 9 | A heavily loaded boat is floating in a pond. The boat sinks because of a leak. What happens to the surface level of the pond? | It goes down. | |
| 9 | A heavily loaded boat is floating in a pond. The boat starts to sink because of a leak but quick action plugging the leak stops the boat from going under although it is now deeper in the water. What happens to the surface level of the pond? | It stays the same. | |
| 9 | A hole is poked through the metal side of a drum holding water. The hole is 18 cm below the water surface. What is the initial speed of outflow? | 1.9 m/s | |
| 9 | A jet of water flowing from a hose at 15 m/s is directed against a wall. If the mass flow in the fluid stream is 2.0 kg/s, what force is the water applying to the wall if backsplash is negligible? | 30N | |
| 9 | A large stone is resting on the bottom of the swimming pool. The normal force of the bottom of the pool on the stone is equal to the: | difference between the weight of the stone and the weight of the displaced water. | |
| 9 | A piece of aluminum has density 2.70 g/cm3 and mass 775 g. The aluminum is submerged in a container of oil (oil's density = 0.650 g/cm3). How much oil does the metal displace? | 287 cm^3 | |
| 9 | A piece of aluminum has density 2.70 g/cm3 and mass 775 g. The aluminum is submerged in a container of oil of density 0.650 g/cm3. A spring balance is attached with string to the piece of aluminum. What reading will the balance register in grams (g) for the submerged metal? | 588 g | |
| 9 | A ping-pong ball has an average density of 0.0840 g/cm^3 and a diameter of 3.80 cm. What force would be required to keep the ball completely submerged under water? | 0.258 N | |
| 9 | A pipe carrying water has a radius of 1.0 cm. If the flow velocity is 9.0 cm/s, which of the following characterizes the flow? Take the viscosity of water to be 1.0*10^-3 N·s/m. | streamlined | |
| 9 | A pipe of diameter three cm is replaced by one of the same length but of diameter six cm. If the pressure difference between the ends of the pipe remains the same, by what factor is the rate of flow of a viscous liquid through it changed? | 16 | |
| 9 | A solid object is made of two materials, one material having density of 2 000 kg/m3 and the other having density of 6 000 kg/m3. If the object contains equal masses of the materials, what is its average density? | 3000 kg/m^3 | |
| 9 | A solid object is made of two materials, one material having density of 2 000 kg/m3 and the other having density of 6 000 kg/m3. If the object contains equal volumes of the materials, what is its average density? | 4000 kg/m^3 | |
| 9 | A solid rock, suspended in air by a spring scale, has a measured mass of 9.00 kg. When the rock is submerged in water, the scale reads 3.30 kg. What is the density of the rock? (water density = 1 000 kg/m3) | 1.58*10^3 kg/m^3 |
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