Odpowiedź :
Odpowiedź:
h=1000 m
g=10 m/s^2
cw=4200 J/kgK
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ΔT=10*1000/4200=2,38 K
Wyjaśnienie:
Ep=m*g*h energia potencjalna
Q=m*cw*ΔT ciepło
m*cw*ΔT=m*g*h
ΔT=g{m/s^2]*h{m}/cw{J/kgK]
jednostki
J=N*m=kg*m*m/s^2
(m/s^2)*m*(kgK/J)=m^2*kg*K/(kg*m^2/s^2)=K
[tex]dane:\\h = 1000 \ m\\c_{w} = 4200\frac{J}{kg\cdot^{o}C}\\g = 10\frac{N}{kg}\\szukane:\\\Delta T = ?\\\\\\E_{p} = Q\\\\E_{p}=m\cdot g\cdot h\\\\Q = c_{w}\cdot m\cdot \Delta T\\\\c_{w}\cdot m\cdot \Delta T = m\cdot g\cdot h \ \ /:(c_{w}\cdot m)\\\\\Delta T = \frac{g\cdot h}{c_{w}}\\\\\Delta T = \frac{10\frac{N}{kg}\cdot1000 \ m}{4200\frac{J}{kg^{o}C}} = \frac{10000\frac{J}{kg}}{4200\frac{J}{kg\cdot^{o}C}}\\\\\underline{\Delta T = 2,38^{o}C}[/tex]