Questions from College Physics


Q: A nozzle is connected to a horizontal hose. The nozzle shoots

A nozzle is connected to a horizontal hose. The nozzle shoots out water moving at 25 m/s. What is the gauge pressure of the water in the hose? Ignore viscosity and assume that the diameter of the nozz...

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Q: A rotating star collapses under the influence of gravitational forces to form

A rotating star collapses under the influence of gravitational forces to form a pulsar. The radius of the pulsar is 1.0 × 10−4 times the radius of the star before collapse. There is no change in mass....

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Q: What is the quark content of an antiproton? [Hint

What is the quark content of an antiproton? [Hint: Replace each of the three quarks that compose a proton with its corresponding antiquark.]

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Q: The graph with Problem 24 shows vx(t) for a

The graph with Problem 24 shows vx(t) for a skateboard moving along the x-axis. Rank the times t = 0.5 s, 1.5 s, 2.5 s, 3.5 s, 4.5 s, and 5.5 s, in order of the magnitude of the acceleration, from lar...

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Q: Suppose air, with a density of 1.29 kg/

Suppose air, with a density of 1.29 kg/m3, is flowing into a Venturi meter. The narrow section of the pipe at point A has a diameter that is / of the diameter of the larger section of the pipe at poi...

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Q: A 5.60 kg uniform door is 0.760 m

A 5.60 kg uniform door is 0.760 m wide by 2.030 m high, and is hung by two hinges, one at 0.280 m from the top and one at 0.280 m from the bottom of the door. If the vertical components of the forces...

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Q: In gamma-ray astronomy, the existence of positrons (e

In gamma-ray astronomy, the existence of positrons (e+) can be inferred by characteristic gamma-ray photons that are emitted when a positron and an electron (e−) annihilate. For simplicity, assume tha...

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Q: A water tower supplies water through the plumbing in a house.

A water tower supplies water through the plumbing in a house. A 2.54 cm diameter faucet in the house can fill a cylindrical container with a diameter of 44 cm and a height of 52 cm in 12 s. How high a...

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Q: In a motor, a flywheel (solid disk of radius R

In a motor, a flywheel (solid disk of radius R and mass M) is rotating with angular velocity ωi. When the clutch is released, a second disk (radius r and mass m) initially not rotating is brought into...

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Q: Spider silk has a Young’s modulus of 4.0 GPa and

Spider silk has a Young’s modulus of 4.0 GPa and can withstand stresses up to 1.4 GPa. A single web strand has a cross- sectional area of 1.0 × 10−11 m...

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