JEE Main 202623 Jan, Morning shiftPhysicsMediumThermodynamics163× since 2002
In a perfectly inelastic collision, two spheres made of the same material with masses 15 kg and 25 kg, moving in opposite directions with speeds of 10 m/s and 30 m/s, respectively, strike each other and stick together. The rise in temperature (in °C), if all the heat produced during the collision is retained by these spheres, is : (specific heat of sphere material 31 cal/kg°C and 1 cal = 4.2 J)