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Дано:                                      Решение:

η=0,4                                              η=Aп/Аз

g=10м/с^2                                    Ап=mcΔT; Аз=mgh

ΔT=10 C                                        

c=230 Дж/(кг*С)                          η=mcΔT/mgh  = cΔT/gh => h=cΔT/ηg  

h-?                                                   h=(230*10)/(0,4*10)=575 м

Ответ: 575 м