Fizica clasa a 10-a

[baiatul122001]

Ex 11 si 12 , va rog mult , dar e destul si ex 11 daca puteti

[DD]

Caldura ce se obtine prin arderea carbunelui
Qtot=40.*3*10^7=120*10^7J/h si Q1=Qtot/2
Q1=60*10^7J/h
Q1=600000000/3600==1000000/6 J/s
Pn/Q=0.6 Pn=Q*0.6=100000W=100K W
μc=60%=1-T2/T1=1-0300/T1->T1=300/0,4=750grK
Conf. Legii gazelor perfecte;
P*V=γ*R*T1 sau 1.5*10^5*5*10^- 3= γ*8.31*10^3 *750
γ=750/(8.31*10^3*750)=0,12*10^-3kmoli
V=22.41*0.12*10^-3m^3 m=V*ρ=2.7*10^-3*1.205=
3.25*10^-3kg=3.25gr

[baiatul122001]

Multumesc mult!!!

[baiatul122001]

La 12 , de ce imi da Lc negativ??

[DD]

[baiatul122001]

Multumesc mult!!