A bullet of mass 50g and specific heat capacity 800kg−1K−1is initially at a temperature 20∘C. It is fired vertically upwards with a speed of 200ms−1and on returning to the starting point strikes a lump of ice at 0∘C and gets embedded in it. Assume that all the energy of the bullet is used up in melting. Neglect the friction of air. Latent heat of fusion of ice =3.36×105Jkg−1

A bullet of mass 50g and specific heat capacity 800kg−1K−1is initi

1.	A bullet of mass 50g and specific heat capacity 800kg−1K−1is initially at a temperature 20∘C. It is fired vertically upwards with a speed of 200ms−1and on returning to the starting point strikes a lump of ice at 0∘C and gets embedded in it. Assume that all the energy of the bullet is used up in melting. Neglect the friction of air. Latent heat of fusion of ice =3.36×105Jkg−1
Answer» A bullet of mass 50g and specific heat capacity $800 k g^{- 1} K^{- 1}$ is initially at a temperature $20^{\circ} C .$ It is fired vertically upwards with a speed of $200 m s^{- 1}$ and on returning to the starting point strikes a lump of ice at $0^{\circ} C$ and gets embedded in it. Assume that all the energy of the bullet is used up in melting. Neglect the friction of air. Latent heat of fusion of ice $= 3.36 \times 10^{5} J k g^{- 1}$

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