Abstract: The energy density and energy flow of a harmonic longitudinal wave in elastic medium are calculated and the relevant formulas in general physics textbook are further discussed, the composition and origin of the energy flow are analyzed.

Key words: longitudinal wave, energy density, energy flow 地址:北京市海淀区新街口外大街19号 北京师范大学科技楼C区701室 邮编: 100875
电话: 010-58808024 010-58805411 E-mail:cop@bnu.edu.cn
本系统由 北京玛格泰克科技发展有限公司 设计开发