Consider a spring-mass system with the following parameters：m=1x10-6kg, k=1 n/m, b= 1x10-6 ns/m. calculate the natural frequency f0 and quality factor q. assume the input force f=0.001sin2ft (unit: newton). calculate and sketch the steady-state waveforms of the displacement when f=f0. clearly indicate the phase and amplitude of the displacement waveform. hint: the displacement will be sinusoidal function as well. use the transfer function to calculate the amplitude and phase of the displacement.

15. give an example for some particles or waves that are moving faster than light in everyday life 16. what is a laser? 17. what is an oscilloscope? 18. what does it means practically that nothing is faster than light in vacuum? 19. what is vacuum?

A3.9 g aluminum foil ball with a charge of +4.1×10−9 c is suspended on a string in a uniform horizontal e⃗ field. the string deviates to the right and makes an angle of 30∘ with the vertical. part a part complete what information about the e⃗ field can you determine for this situation? what information about the field can you determine for this situation? only the magnitude of e⃗ only the direction of e⃗ both the magnitude and the direction of e⃗ none of the above previous answers correct part b determine the magnitude of the electric field. express your answer with the appropriate units. e e = nothing nothing request answer part c determine the direction of the electric field. determine the direction of the electric field. to the right to the left away from you toward you

Energy flows from the producer level to the level. is called