1700993200
6-8 F与直管成52.5°角,F=55N.
1700993201
1700993202
1700993203
1700993204
1700993205
6-9 时,pA=pB;时,pA<pB;时,pA>pB.
1700993206
1700993207
6-10 9.5m/s.
1700993208
1700993209
6-11 8.8m/s.
1700993210
1700993211
6-12 8.3m/s,9.0m/s.
1700993212
1700993213
6-13 46cm.
1700993214
1700993215
6-14 (1)7.0×10-3m3/s; (2)4.3×10-3m3/s.
1700993216
1700993217
1700993218
6-15
1700993219
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
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