1700993220
6-16 vC=4.2m/s,hQC=0.
1700993221
1700993222
6-17 1.0cm3/s.
1700993223
1700993224
1700993225
1700993226
6-18 (2)
1700993227
1700993228
6-19 Re=3300,为湍流.
1700993229
1700993230
6-20 Re=400,为层流.
1700993231
1700993232
6-21 2.0×105W.
1700993233
1700993234
6-22 πρgR4/8QV.
1700993235
1700993236
6-23 1.2×10-2cm/s,30cm/s.
1700993237
1700993238
6-24 4.8×10-2cm/s.
1700993239
1700993240
6-25 1.4cm/s.
1700993241
1700993242
6-26 不会.
1700993243
1700993244
1700993245
6-27 (1)(2)略; (3)略.
1700993246
1700993247
6-28 略.
1700993248
1700993249
1700993250
6-29 将对称轴设为z轴,壶的表面由平面曲线绕z轴旋转而成,其中u为假设的液面下降速率.
1700993251
1700993252
1700993253
6-30
1700993254
1700993255
1700993256
6-31
1700993257
1700993258
第 七 章
1700993259
1700993260
1700993261
7-1 (1)A=0.4m,ω=3π/s,
1700993262
1700993263
1700993264
(2)=π/2,x0=0,v0=-1.2πm/s;(3)x=-0.4m,vx=0,ax=3.6π2m/s2.
1700993265
1700993266
1700993267
7-2 提前
1700993268
1700993269
7-3 A=2x0.
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