Question

有一正方體銅塊，質(zhì)量是8.9 kg，現(xiàn)將它放在1m² 的水平桌面中間，則它對(duì)桌面的壓強(qiáng)是 (ρ_銅=8.9×10³Kg/m^3_，g=10 N/kg)    

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A．8900Pa    
B．89Pa    
C．8.9Pa    
D．以上均不對(duì)

Answer 1

A