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A tuning fork generates sound waves with a frequency of 246 Hertz. The waves travel in opposite directions along a hallway, are reflected by end walls, and return. The hallway is 47.0 m long and the tuning fork is located 14 m from one end. Find the phase difference between the reflected waves when they meet at the tuning fork? The speed of sound is 343 m/s.
question what is the fractional change in the resistance of an iron filament when its temperature changes from 25.0degc
a cordless electric shaver uses energy at a rate of 3.7 w from a rechargeable 1.5-v battery. each of the charged
A hiker is approaching a sheer cliff wall. She yodels, and hears the echo of her yodel after 3.3 s. How far is she from the cliff
A door is made of uniform material of density p and has a height of h, t thick, w wide. When the door is released from rest theta not from the doorframe, it swings closed on it's frictionless hinges time t1.
The amplitude of a lightly damped oscillator decreases by 2.8% during each cycle. What percentage of the mechanical energy of the oscillator is lost in each cycle?
A map suggests that Atlanta is 728 miin a direction of 5.20° north of east from Dallas. The same map shows that Chicago is 560 miles in a direction of 21.1° west of north from Atlanta. Modeling the Earth as flat, use this information to find the dis..
A person stands on a bathroom scale in a motionless elevator. When the elevator begins to move, the scale briefly reads only 0.82 of the person's regular weight, Find the direction of the acceleration
A 0.70-kg disk with a rotational inertia given by MR2/2 is free torotate on a fixed horizontal axis suspended from the ceiling. A string is wrapped around thedisk and a 2.0-kg mass hangs from the free end. I
in a race john runs 1.00 mile in 4.02 min mounts a bicycle and rides back to his starting point which is also the
A rock of mass m = 1.0 kg is tied to a string of length L = 1.9 m and is twirled in a vertical circle. The speed v of the rock is constant; that is, it is the same at the top and the bottom of the circle. If the tension in the string is zero when the..
A piece of putty of mass m = 0.75 kg and velocity v = 2.5 m/s moves on a horizontal frictionless surface. It collides with and sticks to a rod of mass M = 2.0 kg and length L = 0.9 m which pivots about a fixed vertical axis at the opposite end of ..
The heating element of a simple heater consists of a 2.2-m-long, 0.65-mm-diameter nichrome wire. calculate the resistivity of nichrome in this situation
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