Question

Стальной шар массой 5 кг, упав с некоторой высоты на поверхность земли, нагрелся на 0,2°С. На сколько при этом изменилась внутренняя энергия шара? Изменением внутренней энергии земли и воздуха пренебречь если не сложно,можете показать решение на бумаге

Answer 1

вроде бы понятно, но не на бумаге(

Answer 2

Calculation of Change in Internal Energy of the Steel Ball

To calculate the change in the internal energy of the steel ball, we need to consider the specific heat capacity of the material and the change in temperature.

The specific heat capacity of steel is approximately 0.46 J/g°C However, we need to convert the mass of the steel ball from kilograms to grams to use this value.

Given: - Mass of the steel ball = 5 kg - Change in temperature = 0.2°C

First, let's convert the mass of the steel ball from kilograms to grams: - Mass of the steel ball = 5 kg = 5000 g

Next, we can calculate the change in internal energy using the formula: Change in internal energy = mass × specific heat capacity × change in temperature

Substituting the values into the formula: Change in internal energy = 5000 g × 0.46 J/g°C × 0.2°C

Now, let's calculate the change in internal energy: Change in internal energy = 5000 g × 0.46 J/g°C × 0.2°C = 460 J

Therefore, the change in the internal energy of the steel ball is 460 Joules.

Please note that this calculation assumes that there is no heat transfer to the surroundings, and we are only considering the change in internal energy of the steel ball.

If you have any further questions, please let me know!