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A bullet of mass 50g and specific heat capacity 800 J kg−1 K−1 is initially at a temperature 20∘ C.It is fired vertically upwards with a speed of 200 ms−1 and 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 =3.36×105 J kg−1 |
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Answer» A bullet of mass 50g and specific heat capacity 800 J kg−1 K−1 is initially at a temperature 20∘ C.It is fired vertically upwards with a speed of 200 ms−1 and 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 =3.36×105 J kg−1 |
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