<s>[INST] You would have a great future in engineering – but only if you could get the numbers right.
My father and I were working on a model electronic motor. Now, they do indeed work like the full sized versions but they obviously operate at lower voltages and power levels. However, my father was very clear in what he wanted for our project: he could only use a 9 volt battery. However, when I used the motor with the battery, it failed miserably. How would you choose an alternative power source?[/INST]