Physics, 09.03.2022 17:30 maryam2863
A sound wave in a steel rail of a railroad track has a frequency of 650 Hz and a wavelength of 6.2 m. What is the speed of sound (in m/s) in this rail?
Answers: 1
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The magnitude of the poynting vector of a planar electromagnetic wave has an average value of 0.939 w/m2 . the wave is incident upon a rectangular area, 1.5 m by 2.0 m, at right angles. how much total electromagnetic energy falls on the area during 1.0 minute
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Aproton is projected toward a fixed nucleus of charge +ze with velocity vo. initially the two particles are very far apart. when the proton is a distance r from the nucleus its velocity has decreased to 1/2vo. how far from the nucleus will the proton be when its velocity has dropped to 1/4vo?
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An input force of 7 n is applied to a machine with a mechanical advantage of 1.75. what is the maximum the machine could lift? 12.25 n7n7.25 n26.2 n
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An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge
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A sound wave in a steel rail of a railroad track has a frequency of 650 Hz and a wavelength of 6.2 m...
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