Question

Using this energy transformation diagram of a battery powered drill, what is the drill’s thermal energy output?

J

Answer 1

I don’t have the diagram or the energy numbers — could you upload the diagram or list the energy amounts shown (input from the battery and the amounts labeled for mechanical work, light, sound, etc.)?

Meanwhile, here’s how to get the thermal output once you have the numbers:

1. Identify the total energy supplied by the battery: E_in (J).
2. Add up the energies that go into non‑thermal outputs (useful work and other forms): E_mech + E_sound + E_light + ... = E_other.
3. Thermal energy output = E_in − E_other.

So:
E_thermal = E_in − (E_mech + E_sound + E_light + …)

If the problem gives an efficiency η for converting battery energy to useful mechanical work, then:
E_thermal = E_in − η·E_in = (1 − η)·E_in.

Example: if E_in = 6000 J, mechanical = 4500 J and sound = 300 J, then
E_thermal = 6000 − (4500 + 300) = 1200 J.

Send the diagram or the numbers and I’ll compute the exact thermal output.