1) Ek/5 = Q
Ek = mV²/2
Q = cmΔt
mV²/10 = cmΔt
V²/10 = cΔt
Δt = V² / 10*c = 160000 / 10 * 130 ~ 123 °C
2) Ek*52/100 = Q
Ek = mV²/2
Q = cmΔt
mV²*52/200 = cmΔt
V²*52/200 = cΔt
Δt = V² * 52 / 200*c = 10000 * 52 / 200 * 130 = 20 °C
3) E/2 = Q
E = Eп = m₁gh
Q = cm₂Δt
m₁gh/2 = cm₂Δt
Δt = m₁gh/m₂c*2 = 2000 * 10 * 3 / 1 * 130 * 2 ~ 230.7 °C