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A plumber is trying to fix a clog in a vertical pipe, but does not know how far down in the pipe the clog and the water level is. He is a good whistler, so he whistles into the open end of the pipe and finds that a frequency of 104hz (cycles per second) returns a loud resonant sound. He knows the speed of sound is 340 m/s. Calculate the depth of the air in the pipe above the clog.
A war-wolf or trebuchet is a device used during the Middle Ages to throw rocks at castles and now sometimes used to fling large vegetables and pianos as a sport. A simple trebuchet.
A wedding ring (of diameter 1.7 cm) is tossed into the air and given a spin, resulting in an angular velocity of 12 rotations per second. The rotation axis is a diameter of the ring. Taking the magnitude of the Earth's magnetic field to be 4.3 10-5 T..
You measure the length of a futuristic car to be 3.50m when the car is at rest relative to you. what result do you get
A photon of wavelength 4.28 x 10^-2 nm strikes a free electron and is scattered at an angle of 32.0 degrees from its original direction. find the energy gained by the electron
Ordinary glasses are worn in front of the eye and usually 2.00{\rm cm} in front of the eyeball. What focal length lenses are needed to correct his vision
A pendulum bob is released from the some initial height such that the speed of the bob at the bottom of the swing is 1.9m/s. What is the initial height of the bob
A ball of mass m = 2.6 kg moving with a speed of v0 = 14.8 m/s strikes an identical ball which was initially at rest. What is the final speed of the struck ball
The conduction electrons in a metal can be considered for some purposes as an ideal gas. Find the beam current in amperes
A straight rod of length L = 22.2 cm, carries a uniform charge, ? = 3.00 × 10-6 C/m, What is the magnitude of the electric field at yP = 50.0 cm
A 40cm -tall, 6.0cm -diameter cylindrical beaker is filled to its brim with water. What is the downward force of the water on the bottom of the beaker
Considered an elastic collision in one dimension in which one of the objects is initially at rest. Notice that mass 2 is the one that is initially at rest. find the final velocity of the bigger object
Calculate the magnitude and direction of net electric field. what is the efficiency of the engine under those conditions.
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