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A student holds a tuning fork oscillating at 260 Hz. He walks towards a wall at a constant speed of 1.16 m/s.
What beat frequency does he observe between the tuning fork and its echo?
How fast must he walk away from the wall to observe a beat frequency of 4.50 Hz?
A centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. How many revolutions per minute is the sample making
A string is wrapped around a disk of mass m = 1.7 kg and radius R = 0.08 m. Starting from rest, you pull the string with a constant force F = 7 N along a nearly frictionless surface. At the instant while the center of the disk has moved a distance..
A lady is pulling her luggage that has a mass of 24 kg. What is the total power exerted on the luggage by the lady
If the air in the tube is replaced with a different gas, the frequency of the fundamental standing wave changes to 60·Hz. What is the speed of sound in this new gas
An 18-year-old runner can complete a 10.0 km course with an average speed of 4.38 m/s. A 50-year-old runner can cover the same distance with an average speed of 3.88 m/s. How much later (in seconds) should the younger runner start in order to fini..
The charges and coordinates of two charged particles held fixed in the xy plane are: q1=6.00 ?C, x1=6.700 cm, y1=4.600 cm, Find the direction and magnitude of the electrostatic force on q2
In what direction should the pilot travel in this direct flight. Find out the distance she walks.
Air "breaks down" when the electric field strength reaches 3*10^6 N/C, causing a spark. How many electrons must be transferred from one disk to the other to create a spark between the disks
An electron remains in an excited state of an atom for typically 10-8 s. What is the minimum uncertainty in the energy of the state
A stone thrown horizontally from a height of 5.87 m hits the ground at a distance of 13.90 m. Calculate the initial speed of the stone
The G string of a guitar which should be 397 Hz is playing flat at 380 Hz. What percentage change in the tension of the wire is necessary so as to tune the string to 392 Hz.
A 28 mH inductor in series with a resistance of 35 omegacap.gif is connected to a source whose voltage is script E = 340 V cos 150?t, Determine the average power dissipation
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