感谢大佬~这道物理题怎么解呢

2025-06-20 16:45:05
推荐回答(1个)
回答1:

PV=C
p0*0.8=p1*1
p1=0.8p0
f=pS=(p0-0.8p0)*0.3*10^(-4)
=mw^2*r=0.003*w^2*1