Physics, 15.04.2020 01:43 Estefaniamarilicolin
A 2.55 g lead bullet at 21.2 ◦C is fired at a speed of 212 m/s into a large block of ice at 0 ◦C, into which it embeds itself. What quantity of ice melts? Assume the specific heat of lead is 128 J/kg · ◦C and the latent heat of fusion of water 3.33 × 105 J/kg. Answer in units of g.
Answers: 2
![m_{ice}= \frac{m_{bullet}\cdot \left[\frac{1}{2}\cdot (v_{o}^{2}-v_{f}^{2}) + c\cdot (T_{o}-T_{f})\right]}{L_{f}}](/tpl/images/0600/6297/6637d.png)
![m_{ice} = \frac{(2.55\,g)\cdot \left\{\frac{1}{2}\cdot \left[(212\,\frac{m}{s} )^{2}-(0\,\frac{m}{s} )^{2}\right]+\left(128\,\frac{J}{kg\cdot ^{\textdegree}C} \right)\cdot (21.2\,^{\textdegree}C - 0\,^{\textdegree}C) \right\}}{3.33\times 10^{2}\,\frac{J}{g} }](/tpl/images/0600/6297/5ea7b.png)
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A 2.55 g lead bullet at 21.2 ◦C is fired at a speed of 212 m/s into a large block of ice at 0 ◦C, in...
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