Energy of the oscillating system
A damped mass-spring system oscillates at 205 Hz. The time constant of the system is 2.0 s. At t = 0, the amplitude of oscillation is 4.7 cm and the energy of the oscillating system is then 47 J.
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a 900 kg drag race car accelerates from rest to 103 km/hr in 0.862 seconds. What average force is exerted on the car?
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A sinusoidal electromagnetic wave having a magnetic field of amplitude 1.25 mu {rm T} and a wavelength of 432 {rm nm} is traveling in the + x direction through empty space. What is the frequency of this wave?
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