Question

Під час охолодження кулі масою 1,5 кг від 50 до 40 deg * C виділилося 3450 кДж теплоти. З якого матеріалу виготовлено кулю Срочно! ​

Answer 1

Ответ: олово

Объяснение:

Дано:

m=1,5кг

t1=50°C

t2=40°C

Q=3450Дж

-------------------

с-?

Q=c*m*(t1-t2)

Отсюда:

c=Q/(c*t1-t2)=3450000/(1,5*(50-40))=230Дж/кг°С

По таблице удельных теплоемкостей находим, что это олово

Answer 2

The Material of the Ball That Released 3450 kJ of Heat When Cooled from 50 to 40°C

To determine the material of the ball, we need to consider the heat capacity of the material. The heat capacity is a measure of how much heat energy a substance can absorb or release when its temperature changes. Different materials have different heat capacities.

The formula to calculate the heat released or absorbed during a temperature change is:

Q = m * C * ΔT

Where: - Q is the heat released or absorbed (in joules) - m is the mass of the object (in kilograms) - C is the specific heat capacity of the material (in joules per kilogram per degree Celsius) - ΔT is the change in temperature (in degrees Celsius)

In this case, we know the following values: - Q = 3450 kJ = 3450 * 1000 J - m = 1.5 kg - ΔT = 50 - 40 = 10°C

Using the formula, we can rearrange it to solve for C:

C = Q / (m * ΔT)

Substituting the known values:

C = (3450 * 1000 J) / (1.5 kg * 10°C)

Calculating this, we find:

C ≈ 230,000 J/kg°C

Now, we need to find a material with a specific heat capacity close to 230,000 J/kg°C. Let's search for materials with similar heat capacities.

According to the search results, the specific heat capacity of water is approximately 4186 J/kg°C [[1]]. This value is significantly higher than the calculated value of 230,000 J/kg°C. Therefore, we can conclude that the ball is not made of water.

Other common materials and their specific heat capacities include: - Aluminum: 900 J/kg°C [[2]] - Copper: 386 J/kg°C [[3]] - Iron: 448 J/kg°C [[4]] - Lead: 128 J/kg°C [[5]] - Silver: 235 J/kg°C [[6]] - Steel: 460 J/kg°C [[7]] - Zinc: 388 J/kg°C [[8]]

None of these materials have a specific heat capacity close to 230,000 J/kg°C. It is possible that the ball is made of a less common material or a composite material with a unique heat capacity.

Unfortunately, without more information or additional search results, it is difficult to determine the exact material of the ball.