Assume that, when we walk, in addition to a fluctuating vertical force, we exert a periodic lateral force of amplitude 25 n at a frequency of about 1 hz. given that the mass of the bridge is about 2000 kg per linear meter, how many people were walking along the 144-m-long central span of the bridge at one time, when an oscillation amplitude of 75 mm was observed in that section of the bridge? take the damping constant to be such that the amplitude of the undriven oscillations would decay to 1/e of its original value in a time t=6t, where t is the period of the undriven, undamped system. express your answer numerically to three significant figures.
Answers: 1
Physics, 22.06.2019 11:20
If the radius of curvature of the cornea is 0.75 cm when the eye is focusing on an object 36.0 cm from the cornea vertex and the indexes of refraction are as described before, what is the distance from the cornea vertex to the retina? express your answer to two significant
Answers: 3
Physics, 22.06.2019 14:00
Often called simply "velocity," this is the velocity of an object at a particular moment in time.
Answers: 1
Physics, 22.06.2019 20:00
What is the name of the perceived change in a sound waveโs frequency due to motion between the observer and the sound source?
Answers: 1
Physics, 22.06.2019 21:20
Abeverage can is made of 3004-h19 aluminum alloy (elastic modulus 69 gpa, tensile yield strength 285 mpa, density 2.72 g/cm^3). the dimensions on the can are approximated as a thin-walled cylinder with a height of 4.83 inches, diameter of 2.60 inches. empty the can has a mass of 14.2 g. determine: a. the wall thickness of the cylinder b. assuming a pinned-pinned condition what is the critical load? c. assuming a fixed-fixed condition what is the critical load?
Answers: 1
Assume that, when we walk, in addition to a fluctuating vertical force, we exert a periodic lateral...
Advanced Placement (AP), 20.03.2020 02:08
English, 20.03.2020 02:09
Mathematics, 20.03.2020 02:09
Social Studies, 20.03.2020 02:11