Bhautik Study

Q. A 10kW drilling machine is used to drill a bore in a small aluminum block of mass 8.0 kg. How much is the rise in temperature of the block in 2.5 minutes assuming 50% of power is used up in heating the machine itself or lost to the surroundings? Specific heat of aluminum = 0.91 Jg^{-1 0}C^-1                                                                                                                                                                              (CBSE)