A lead bullet of specific heat 0 032 kcal kg-1C-1strikes a target with velocity of 300 ms-1 If the bullet - Physics - Thermodynamics

Question

A lead bullet of specific heat 0 032 kcal
kg-1C-1strikes a target with velocity of 300
ms-1 If the bullet is completely stopped by target ,find
the rise in temperature of the bullet Assume that the heat produced
is equally shared by the target and the bullet (J=4 2 J
cal​-1) ANS:167 4 C

Dinesh Pandey · Accepted Answer

Dear Student,

Let m be the mass of the bullet
The kinetic energy associated with the bullet,K
E=12mv2K
E=12×m×3002=m×45000 JAccording to law of conservation of energy,m×450002=m×4
2×103×0
032×θwhere, θ=rise in temperatureθ=450002×4
2×103×0 032=167 41°C

A lead bullet of specific heat 0.032 kcal kg-1C-1strikes a target with velocity of 300 ms-1.If the bullet is completely stopped by target ,find the rise in temperature of the bullet.Assume that the heat produced is equally shared by the target and the bullet.(J=4.2 J cal​-1). ANS:167.4 C

A lead bullet of specific heat 0.032 kcal kg^-1C^-1strikes a target with velocity of 300 ms^-1.If the bullet is completely stopped by target ,find the rise in temperature of the bullet.Assume that the heat produced is equally shared by the target and the bullet.(J=4.2 J cal^-1). ANS:167.4 C