Initial data: m (weight of the iron rivet) = 100 g (0.1 kg); Δt (rivet temperature change during cooling) = 900 ºС.
Reference values: Czh (specific heat of iron) = 460 J / (kg * K).
The amount of heat released during cooling of the taken iron rivet is determined by the formula: Q = Cc * m * Δt.
Calculation: Q = 500 * 0.1 * 900 = 41.4 * 10 ^ 3 J (41.4 kJ).
Answer: When the iron rivet is cooled, 41.4 kJ of heat will be released.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.