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A high speed train is traveling at a speed of 44.7m/s when the engineer sounds the 415hz warning horn. the speed of sound is 343m/s. what are the frequency and wavelength of the sound as perceived by a person standing at the crossing when the train is a) approaching and b) leaving the crossing?
Find the acceleration of the aircraft and express it in multiples of g, free fall acceleration.
A stretched string of length L is plucked at a position L/5 by producing an initial displacement h and then releasing the string. Find the amplitudes for the fundamental and the first three harmonics.
1. a batter hits a 0.140-kg baseball that was approaching him at 30.0 ms and as a result the ball leaves the bat at
A 8.00 nF capacitor is charged up to 14.0 V , then disconnected from the power supply and connected in series through a coil. Calculate the maximum charge on the capacitor
Physicians use electroencephalograms (EEGs) to study electrical oscillations in the human brain. So-called beta oscillations, whose enhancement has been linked to alcoholism, have frequencies from 12 to 30 Hz . What's the corresponding range in perio..
Ultrasound with a frequency of 4.288 MHz can be used to produce images of the human body. what is the wavelength in the body
flight to mars. to send a satellite from earth to mars a rocket must accelerate the satellite until it is in the
A batter hits a fly ball which leaves the bat 0.88above the ground at an angle of 62 with an initial speed of 28 heading toward centerfield. Ignore air resistance. How far from home plate would the ball land if not caught? T
a 0.400 kg object is swung in a vertical circular path on a string 0.550 m long. if its speed is 3.60 ms at the top of
Two students stand opposite each other on the rim of the merry-go-round of 6m diameter and rotating at 12 rev/minute. Calculate the coriolis force on the ball
what issues presented themselves as obstacles and what were opportunities that advanced nanotechnology in
A LASIK vision correction system uses a laser that emits 10 -long pulses of light, each with 2.5 of energy. The laser is focused to a 0.90 -diameter circle. What is the average power of each laser pulse
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