: Archimedes' principle, floating bodies, and pressure in liquids. Example Problem: Thermal Balance Question : A 500g piece of ice at -10∘Cnegative 10 raised to the composed with power C is placed in a calorimeter containing 1kg of water at 20∘C20 raised to the composed with power C
. What is the final temperature and state of the system? (Specific heat of ice , heat of fusion olimpiadnye zadachi po fizike za 8 klass s reshenijami
Find how much heat the ice needs to reach 0∘C0 raised to the composed with power C : Archimedes' principle, floating bodies, and pressure in
Qw=mw⋅cw⋅Δt=1kg⋅4200J/kg⋅∘C⋅20∘C=84,000Jcap Q sub w equals m sub w center dot c sub w center dot delta t equals 1 space kg center dot 4200 space J/kg center dot raised to the composed with power C center dot 20 raised to the composed with power C equals 84 comma 000 space J (Specific heat of ice , heat of fusion
Qi1=mi⋅ci⋅Δt=0.5kg⋅2100J/kg⋅∘C⋅10∘C=10,500Jcap Q sub i 1 end-sub equals m sub i center dot c sub i center dot delta t equals 0.5 space kg center dot 2100 space J/kg center dot raised to the composed with power C center dot 10 raised to the composed with power C equals 10 comma 500 space J