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m = 1000kg
v = 72km/h = 20m/s
Szukane:
Q = ?
Rozwiazanie:
Q = Ek
Q = m * v² *½
[Q] = [kg * m² :s² ] = [J]
Q = 1000 * 20² *½
Q = 2 000 00 J
Q = 200 kJ
odp. cieplo oddane do otoczenia to 200 kJ.