题目内容
现有体积相同的实心铁球和实心塑料球。为了测量塑料球的密度,将1个铁球放在已调节平衡的天平左盘中,当右盘放6个相同塑料球时,天平恰好能平衡,已知铁的密度为7.8×103千克/米3,则该塑料球的密度为( )
A.7.8×103千克/米3 | B.1.3×103千克/米3 |
C.0.6×103千克/米3 | D.0.16×103千克/米3 |
B
试题分析:依题意可知
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