https://www.chegg.com/homework-help/questions-and-answers/2-12-points-suggested-time-25-minutes-cart-moves-kinetic-energy-kiai-track-collides-lighte-q37321580
https://www.chegg.com/homework-help/questions-and-answers/right-end-long-flexible-string-attached-fixed-point-wall-left-end-string-held-stuendt-stud-q27493285
https://www.chegg.com/homework-help/questions-and-answers/student-creates-second-symmetric-wave-pulsethat-tvelin-ightonthe-samestingthe-mlein-d-ha-a-q28198229
https://www.chegg.com/homework-help/questions-and-answers/figure-shows-idealized-wave-pulse-traveling-right---center----consider-instant-center-puls-q28193116
https://www.chegg.com/homework-help/questions-and-answers/figure-1-5-7-points-suggested-time-13-minutes-students-physics-lab-use-battery-three-ident-q37578235