Pgbg``lhmg umn: ? f / s ? >7 f / s ? 1 . 7 f / s ? ;71 f ;71 f / s ?
Pu rgspugstn gs `hrrg`tn.
Qrgiumtn ; @hfpbgtnkn Qumtún >.1 shorg >.1
Wm `hrrgkhr pnrtg kgb rgphsh (T 1 6 1 f / s ) y rg`hrrg umn klstnm`ln ?
x6>11 f `hm umn n`gbgrn`lð n`gbgrn`lðm m kg ? . >9 f / s . ¸@uîb dug su vgbh`lknk dlmnb ( v d )8 [lp. _g`ugrkn qug bn gxprgslðm fntgfîtl`n qug kgtgrflmn bn vgbh`lknk gs:
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