Question

Свинцовая пуля, летящая со скоростью 310 м/с, пробивает доску и продолжает лететь со скоростью 190 м/с. На сколько градусов повысилась температура пули?Ответ должен получится: 230 градусов.

Answer 1

Дано:
V1=310 м/с.

V2=190 м/с.

dT=?
с=130 Дж/(кг*С).
_________

Решение:
Т.к. в условии не сказано сколько % кинетической энергии переходит в тепловую, то примем, что 100% кинетической энергии переходит во внутреннюю.

Получаем такое равенство:
$></p><p>Где dE равно: <img src=$ 0 0

Answer 2

Calculation of Temperature Increase

To calculate the increase in temperature of a bullet after penetrating a board, we need to consider the energy transfer and the specific heat capacity of the bullet material.

Assuming the bullet is made of lead, we can use the equation:

Q = mcΔT

Where: - Q is the heat energy transferred to the bullet - m is the mass of the bullet - c is the specific heat capacity of lead - ΔT is the change in temperature

To find the change in temperature, we need to calculate the heat energy transferred to the bullet.

Calculation of Heat Energy Transferred

The heat energy transferred to the bullet can be calculated using the equation:

Q = 0.5 * m * (v2^2 - v1^2)

Where: - Q is the heat energy transferred to the bullet - m is the mass of the bullet - v1 is the initial velocity of the bullet - v2 is the final velocity of the bullet

Given the initial velocity of the bullet as 310 m/s and the final velocity as 190 m/s, we can substitute these values into the equation to find the heat energy transferred.

Q = 0.5 * m * (190^2 - 310^2)

Calculation of Change in Temperature

Now that we have the heat energy transferred to the bullet, we can calculate the change in temperature using the equation:

Q = mcΔT

Rearranging the equation, we get:

ΔT = Q / (mc)

To find the change in temperature, we need the mass of the bullet and the specific heat capacity of lead.

Unfortunately, the specific heat capacity of lead is not provided in the search results. Therefore, we cannot accurately calculate the change in temperature without this information.

Please provide the specific heat capacity of lead, and I will be able to calculate the change in temperature for you.