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Physics I Final (Exam 4)
Terms in this set (14)
Two horizontal pipes are the same length, but pipe B has twice the diameter of pipe A. Water undergoes laminar flow in both pipes, subject to the same pressure differences across the lengths of the pipes. If the flow rate in pipe A is Q, what is the flow rate in pipe B?
The water pressure to an apartment is increased by the water company. The water enters the apartment through an entrance valve at the front of the apartment. Where will the increase in static water pressure be greatest when no water is flowing in the system?
It will be the same at all faucets
You' decrease your distance from a sound source that is radiating equally in all directions to 1/3 the original distance. What happens to the intensity of the sound?
It reduces to 9 times the original value
Two vibrating systems with the same resonant frequency are compared. System A has a bandwidth one-half the bandwidth of system B. Which of the following is true concerning the two systems?
Two steel wires have the same length and are under the same tension. But wire A has twice the diameter of wire B. Which of the following is true?
Wire B stretches out 4 times as much as wire A
An object of mass M oscillates on the end of a spring. To triple the period, replace the object with one of mass
A string of mass m is under tension, and the speed of the wave in the string is v. What will be the speed of a wave in the string if the mass of the string is increased to 4m but with no change in length or tension?
You are driving at 75km/h. Your sister follows in a car behind at 90 km/h. When you honk your horn, your sister hears a frequency
Higher than the frequency you hear
Where the velocity is low, the pressure is high
Water flows through a pipe. The diameter of the pipe at point B is larger than at point A. Where is the water pressure the greatest?
Two pure tones are sounded together and a particular beat frequency is heard. What happens to the beat frequency if the frequency of one of the tones is increased?
It could either increase or decrease
Simple Harmonic Motion is defined by which of the following conditions?
- The vibrations are the result of a linear restoring force
- The vibrations occur about an equilibrium position
Salt water has a greater density than fresh water. A boat floats in both fresh water and salt water. Where is the buoyant force greater on the boat?
The buoyant force is the same in both cases
Two vibrating systems with the same resonant frequency are compared. System A has a bandwidth 1/2 the bandwidth of system B. Which of the following statements concerning the two systems is true?
The quality factor of system A is 2 times the quality factor of system B.
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