1700993190
6-4 1.0×104N.
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1700993192
6-5 (1)98N,9.56N; (2)略.
1700993193
1700993194
1700993195
6-6
1700993196
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1700993198
6-7
1700993199
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.
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1700993207
6-10 9.5m/s.
1700993208
1700993209
6-11 8.8m/s.
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1700993211
6-12 8.3m/s,9.0m/s.
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1700993213
6-13 46cm.
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6-14 (1)7.0×10-3m3/s; (2)4.3×10-3m3/s.
1700993216
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6-15
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1700993220
6-16 vC=4.2m/s,hQC=0.
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6-17 1.0cm3/s.
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6-18 (2)
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6-19 Re=3300,为湍流.
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1700993230
6-20 Re=400,为层流.
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1700993232
6-21 2.0×105W.
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6-22 πρgR4/8QV.
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6-23 1.2×10-2cm/s,30cm/s.
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6-24 4.8×10-2cm/s.
1700993239
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