Physics, 25.02.2020 18:46, nails4life324
Have you ever listened for an approaching train by kneeling next to a railroad track and putting your ear to the rail? Young's modulus for steel is Y = 2.0 1011 N/m2, and the density of steel is rho = 7860 kg/m3. On a day when the temperature is 19° C, how many times greater is the speed of sound in the rail than in the air? (Treat air as an ideal gas of particles with mass 4.78 10-26 kg and with γ = 1.40.)
Answers: 3
Physics, 21.06.2019 22:00, mattydoug4818
What type of light does this light bulb produce most (i. e. at what wavelength does the spectrum have maximum intensity)?
Answers: 3
Physics, 22.06.2019 10:30, Bayabbay8380
Arunner is training for an upcoming marathon by running around a 100-m-diameter circular track at constant speed. let a coordinate system have its origin at the center of the circle with the x-axis pointing east and the y-axis north. the runner starts at (x, y) = (50 m, 0 m) and runs 2.5 times around the track in a clockwise direction.
Answers: 1
Have you ever listened for an approaching train by kneeling next to a railroad track and putting you...
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