Луч света падает на плоское зеркало. Угол между падающим лучом и отражённым лучами равен 130°. Угол между отражённым лучом и зеркалом равен (выполнить пояснительный чертеж)

Объяснение:

дано Po=5000 Па

Vo=2 м3

1)  работа  ( численно) равна площади фигуры

A=ΔP*ΔV=Po*Vo=5000*2=10 кДж

2) газ получает тепло на участках (1 2) и (2 3)

так как растет объем а потом давление ( температура тоже возрастает)

Q=Q12+ Q23

Q12 5/2 Po*(V2-V1)=2,5*Po*Vo=25 кДж

Q23=3/2 vR(T3-T2)=1.5*vR(2To)=3vRTo=3PoVo=30 кДж

T2=2To    T3=2*T2=4To

Q=55 кДж

3) газ отдает тепло на участках (34) и (41) так как объем и температура в начале уменьшаются а потом уменьшаются давление и температура

4) КПД=A*100%/Q  =10*100%/55=18,2%

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