If the scale of quantum gravity is near TeV, the CERN Large Hadron Collider
will be producing one black hole (BH) about every second. The decays of th
e BHs into the final states with prompt, hard photons, electrons, or muons
provide a clean signature with low background. The correlation between the
BH mass and its temperature, deduced from the energy spectrum of the decay
products, can test Hawking's evaporation law and determine the number of la
rge new dimensions and the scale of quantum gravity.