把一个实心小蜡块轻轻放入盛满酒精的溢水杯中,溢出酒精的质量是3.2 g;若把该蜡块再轻轻放入盛满水的溢水怀中,则溢出水的质量是(已知ρ蜡=0.9×103 kg/m3,ρ酒精=0.8×103 kg/m3)( )A.2.3 g
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![把一个实心小蜡块轻轻放入盛满酒精的溢水杯中,溢出酒精的质量是3.2 g;若把该蜡块再轻轻放入盛满水的溢水怀中,则溢出水的质量是(已知ρ蜡=0.9×103 kg/m3,ρ酒精=0.8×103 kg/m3)( )A.2.3 g](/uploads/image/z/898162-34-2.jpg?t=%E6%8A%8A%E4%B8%80%E4%B8%AA%E5%AE%9E%E5%BF%83%E5%B0%8F%E8%9C%A1%E5%9D%97%E8%BD%BB%E8%BD%BB%E6%94%BE%E5%85%A5%E7%9B%9B%E6%BB%A1%E9%85%92%E7%B2%BE%E7%9A%84%E6%BA%A2%E6%B0%B4%E6%9D%AF%E4%B8%AD%2C%E6%BA%A2%E5%87%BA%E9%85%92%E7%B2%BE%E7%9A%84%E8%B4%A8%E9%87%8F%E6%98%AF3.2+g%EF%BC%9B%E8%8B%A5%E6%8A%8A%E8%AF%A5%E8%9C%A1%E5%9D%97%E5%86%8D%E8%BD%BB%E8%BD%BB%E6%94%BE%E5%85%A5%E7%9B%9B%E6%BB%A1%E6%B0%B4%E7%9A%84%E6%BA%A2%E6%B0%B4%E6%80%80%E4%B8%AD%2C%E5%88%99%E6%BA%A2%E5%87%BA%E6%B0%B4%E7%9A%84%E8%B4%A8%E9%87%8F%E6%98%AF%28%E5%B7%B2%E7%9F%A5%CF%81%E8%9C%A1%EF%BC%9D0.9%C3%97103+kg%2Fm3%2C%CF%81%E9%85%92%E7%B2%BE%EF%BC%9D0.8%C3%97103+kg%2Fm3%29%28%E3%80%80%E3%80%80%29A%EF%BC%8E2.3+g)
把一个实心小蜡块轻轻放入盛满酒精的溢水杯中,溢出酒精的质量是3.2 g;若把该蜡块再轻轻放入盛满水的溢水怀中,则溢出水的质量是(已知ρ蜡=0.9×103 kg/m3,ρ酒精=0.8×103 kg/m3)( )A.2.3 g
把一个实心小蜡块轻轻放入盛满酒精的溢水杯中,溢出酒精的质量是3.2 g;若把该蜡块再轻轻放入盛满水的溢水怀中,则溢出水的质量是(已知ρ蜡=0.9×103 kg/m3,ρ酒精=0.8×103 kg/m3)( )
A.2.3 g
B.3.2 g
C.3.6 g
D.4.0 g
把一个实心小蜡块轻轻放入盛满酒精的溢水杯中,溢出酒精的质量是3.2 g;若把该蜡块再轻轻放入盛满水的溢水怀中,则溢出水的质量是(已知ρ蜡=0.9×103 kg/m3,ρ酒精=0.8×103 kg/m3)( )A.2.3 g
溢出酒精的质量是3.2 g,则蜡块体积为3.2*10^-3/800=4*10^-6m^3
蜡的密度小于水,所以漂浮于水面.p水gV排=p蜡gV,V排=4*10^-6*9/10=3.6*10^-6m^3,因此排开水的质量m=p水V排=1000*3.6*10^-6=3.6*10^-3kg=3.6g
C