A lead bullet specific heat 0.032 is completely stopped when it strike...
Calculation of Heat Generated
To find the rise in temperature when a lead bullet strikes a target, we first calculate the kinetic energy converted into heat.
- **Given Data:**
- Specific heat of lead, \( c = 0.032 \, \text{J/g°C} \)
- Velocity of the bullet, \( v = 300 \, \text{m/s} \)
- Mass of the bullet, \( m \) (assumed to be 1 g for simplicity)
- **Kinetic Energy (KE):**
\[
KE = \frac{1}{2} mv^2 = \frac{1}{2} (1 \, \text{g}) (300 \, \text{m/s})^2 = 45000 \, \text{J}
\]
Heat Distribution
The heat generated is equally shared between the bullet and the target.
- **Heat absorbed by the bullet:**
\[
Q_b = \frac{KE}{2} = \frac{45000 \, \text{J}}{2} = 22500 \, \text{J}
\]
Temperature Rise Calculation
Using the specific heat formula, we can find the rise in temperature (\( \Delta T \)) for the bullet.
- **Formula:**
\[
Q = mc\Delta T
\]
- **Solving for \( \Delta T \):**
\[
22500 \, \text{J} = (1 \, \text{g})(0.032 \, \text{J/g°C})\Delta T
\]
- **Rearranging:**
\[
\Delta T = \frac{22500 \, \text{J}}{0.032 \, \text{J/g°C}} = 703125 \, \text{°C}
\]
Conclusion
The rise in temperature of the lead bullet upon impact is approximately **703125 °C**. This significant increase indicates the intense heat generated during the collision.
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