Question

一物理题.为节能减排,建筑上普遍采用空心砖代替实心砖.质量为3.6kg的某空心砖,规格为20cm*15cm*10cm,砖

Answer 1

1.

3.6/(0.2*0.15*0.1*60%)=2000kg/m^3

2.

3.6*(40%/60%)=2.4kg

3.

(3.6+2.4)*10/0.1-3.6*10/0.1=240帕