But since the drill isn't gaining temperature, there's no temperature difference between the drill and block. So it's not really gaining internal energy due to heat transfer. I'm sure you're right, I'm still just confused on why you can apply the equation for heat transfer to a problem dealing...
Thank you. Isn't work done in this case though (the answer gives a value greater than zero). The volume of the block changes because of the hold made by the drill. That's considered work right?
My physics book does this First Law of Thermodynamics example problem during the chapter that shows the steps into getting the solution. They say a drill bores a hole in a block (so doing work) and increases the temperature of the block. It then states the equation they're using: ΔU = Q - Wdone...