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The whirl is problem 2 is now connected to a motor that keeps it rotating at a constant 20.0 rpm even with the child aboard.
The speed of sound in air is about 660miles/hour. A passenger train approaches an unguarded railroad crossing at a constant speed of 60 miles/hour
Assume the Earth has a circular orbit around the sun of radius and that Mars has a circular orbit around the sun of radius .
An explosion occurs at the end of a pier. The sound reaches the other end of the pier by traveling through three media: air, fresh water and a slender
Two speakers are driven by the same oscillator whose frequency is f. They are located a distance d from each other on a vertical pole.
This system consists of 60-lb and 20-lb blocks A and B, respectively, and 5-lb pulleys C and D that can be treated as thin disks.
A piano tuner stretches a steel piano wire with a tension of 800 N. The steel wire has a length of 0.400 m and a mass of 3.00 g.
A disk-shaped merry-go-round of radius 2.63 m and mass 155 kg rotates freely with an angular speed of .667 rev/s.
A venturi meter is a device for measuring the speed of a fluid within a pipe. The drawing shows a gas flowing at a speed v2 through a horizontal section.
A 40-cm-long tube has a 40-cm-long insert that can be pulled in and out. A vibrating tuning fork is held next to the tube.
The wavelength of a photon is 7 x10 - 7 m. Calculate the frequency of the photon. Also calculate the energy of the photon in Joules and e.V
A sailor strikes the side of his ship just below the surface of the sea. He hears the echo of the wave reflected from the ocean floor directly 3.85 s later.
A steel guitar string has a length of 74 cm and thickness of 0.37 mm. It is under 35N tension. Calculate the wave speed in the string
A loudspeaker is placed between two observers who are 120m apart along the line connecting them. If one observer records a sound level of 60dB
At an open-air concert a person sits at a location that is 7m and 9.10m, respectively, from speakers at each side of the stage.
A 1500-Hz sound and a 8500-Hz sound each emerge from a loudspeaker through a circular opening whose diameter is 0.30 m.
The range of human hearing is roughly from twenty Hz to twenty kilohertz. Based on these limits and a value of 343 m/s for the speed of sound
The carts are loaded with strong magnets that cause them to attract one another. Thus, the speed of each cart increases.
When a guitar string is sounded along with a 440 Hz tuning fork, a beat frequency of 5Hz is heard. When the same string is sounded along with a 436 Hz
Explain the difference between energy and power and how they are related to work. Give examples of each).
Find the total energy of a vibrating string of length L, fixed at both ends, oscillating in its n'th characteristic mode with and amplitude A.
Find the magnitude of the electrostatic force that one charge exerts on the other. Is the force attractive or repulsive?
If the force of friction acting on the two bricks is 5.0 N, how much time will elapse before the bricks come to rest?
When sound emerges from a loudspeaker, is the diffraction angle determined by the wavelength, the diameter of the speaker, or a combination of these two factors
If the frequency of the third harmonic of the vibrating string is 600 Hz, what is the frequency of the first harmonic?