Physics - Heat & Thermo Question with Solution | TestHub

Heat is energy transferred because of a temperature difference.
(A) Brakes heat up by friction, which is work done. No heat transfer.
(C) Rubbing hands is also work against friction. No heat transfer.
(B) The candle is hotter than the block, so heat flows into the block.
(D) The room air is warmer than the water, so heat flows into the glass.