1700993313
1700993314
7-19 0.087g＞a＝Lg2／4π2n2l，n＝1，2，…．
1700993315
1700993316
7-20 T＝0.77s．
1700993317
1700993318
1700993319
7-21
1700993320
1700993321
1700993322
7-22
1700993323
1700993324
1700993325
7-23
1700993326
1700993327
1700993328
7-24
1700993329
1700993330
1700993331
7-25
1700993332
1700993333
7-26 A1＝x0，A2＝βx0＋v0．
1700993334
1700993335
7-27 β＝9.0/s，y＝（-0.1＋1.71t）e-9.0tm．
1700993336
1700993337
1700993338
7-28
1700993339
1700993340
7-29 λ＝0.061．
1700993341
1700993342
7-30 Q＝2.32×103．
1700993343
1700993344
7-31 ω＝ω0．
1700993345
1700993346
7-32 γ＝1.6×10-3N·s/m，fM＝1.0×10-3N．
1700993347
1700993348
1700993349
7-33
1700993350
1700993351
7-34 0.07655～76.55m．
1700993352
1700993353
7-35 5.5×1014Hz．
1700993354
1700993355
7-36 （1）A＝5.0cm，ω＝4.0π/s，u＝2.0m/s，λ＝10cm；（2）x＝（-3.0＋10k）cm，k＝0，±1，±2，…．
1700993356
1700993357
1700993358
7-37 （1）λ＝8cm； （2）
1700993359
1700993360
1700993361
1700993362
（3）（4）